lucid

Hi Everyone,
We're pleased to announce that our 4 fully animated Art Packs for use with Spriter are now available on Steam as of 4 pm today. June 4th EST.
In conjunction with their Steam release we're also introducing a new, lower price point for them and all future art packs, not just on Steam, but on our own Web Store and on affiliate stores as well.
Here are previews of all of the currently available art packs, along with their new prices:
Game Effects Pack $12.99 Basic Platformer Pack $24.99 Adventure Platformer Pack $24.99 Run N' Gun Platformer Pack $24.99 In addition to this substantial price reduction, in celebration of their introduction, all art packs are currently on sale on Steam for 50 percent off, making this an excellent opportunity to snatch up these royalty free Spriter animations Packs for your current and future game projects at an unprecedented low price. For those who have already purchased one or more of our full Art Packs from our web store or any of our affiliates (Not Steam) BEFORE they became available on Steam, please keep an eye out in your in-box for an update email (for the Art Packs you purchased) automatically upgrading it to drastically increase your content. Here's what to expect:
If you already purchased the Effects Pack, then you'll receive the Basic Platformer Pack for free.
If you already purchased any one of the Platformer Packs you'll receive all other Platformer Packs for free.
If you already purchased any of the bundles of 2 Art Packs then you'll receive all the other remaining Art Packs and the next Art Pack we release as well for free.
If you purchased the all Art Packs bundle you'll receive all current and all future art packs we release for free. If you purchased more than one art pack, but one at a time you should qualify for numbers 3 or 4 above, then please email support@brashmonkey.com with the details of each purchase and make the subject title of the email “Art Pack bundle equivalent upgrade” (without quotes) And we'll upgrade your product description in our system and send you the additional art packs. If four days from now you still haven't received your automatic upgrade email, please contact support@brashmonkey.com with your original purchase information for your art packs or bundles and make the subject title of the email “Did not receive art packs upgrade” (without quotes) 
In related news, we're currently working on 2 new Animated Art Packs which we plan to reveal more about within roughly a month.
Cheers!

Just wanted to link to this on the main forum for anyone who's been waiting on this:
viewtopic.php?f=3&t=12569

(update 10/18/2015) The first official reference implementation is ready for testing. More information here.

Hello everyone!
    Welcome to the first post 1.0 release of Spriter.  Aside from a couple of bug fixes, this release includes a new video help option that lets you watch our YouTube tutorials in a floating window (with links to open the playlists in your default browser).  Video Help will show up immediately upon startup to give guidance for beginners, and the window has an option to disable this behavior.  Spriter will now warn you if you try to save outside the project directory that it won't be able to find it's images, and will also provide an explanation and the expected file structure when you load a file with missing images.
An important note for Mac users.  There is an optimization in this version that may correct the performance issues some users have been experiencing on the Mac.  Please let me know if this fixes the issue for you, as it seemed to make a significant difference on our machines.
We will continue to fix bugs and provide minor feature updates, but my primary focus at the moment is completing the developer documentation.
Lastly, if you're reading this and you don't already own Spriter Pro, or you have a friend who doesn't, Steam is having their Autumn Sale now, and Spriter is 50% off until December 2nd.  Spread the word!
Thanks everyone, and enjoy the new build!

download Spriter r2 here
Change-Log 11/28/2014Additions and Enhancements
Performance optimizations - possible fix for Mac slowdown issues Added Video Help on startup (with the option to never show again), and in the Help menu Added a link the Grey Guy example file in the Help menu Added a warning when attempting to save outside of the project directory(with the option to never show again) Added a warning/explanation that pops up when a project has missing images, and displays the expected file tree(with the option to never show again) Added a Help menu option to reset all 'show this message again' checkboxes Saving a resized project no longer allows you to save to your current project folder or any of it's subfolders to avoid confusion and overwriting or mixing up both projects' images Saving a resized project now confirms individual image overwrites as it creates resized copies of images Original image size data is now preserved in Missing Image placeholders Original image size data is now preserved when saving a project with missing images Bug Fixes
Fixed a crash that could occur with certain projects with missing folders and images Fixed a bug that would give autosaves the *.scon extension when working on a project last saved as *.scon, even though all autosave data is saved as scml Fixed a bug that would cause child bones created on very wide parent bones to have 0 width

The video might not seem like much at first, but I think everyone here can agree there's a ton of effort and heavily-formatted code behind this animation. (and formatting, readability, functionality, documentation...)
 
Awesome work so far!

Hello everyone.  Nothing too exciting yet, but here's a basic animation running in the test bed: https://youtu.be/v3JNlNzGgKQ

original post edited with 7/12 update

That did indeed fix the problem. Thanks so much for the help!
 
-- Geoff

Happy New Year!
    This was a big year as we released Spriter 1.0 and are now on Steam.  We also released two new Art Packs, a new promo video, and a new site and forums.  Now that the foundation is set, 2015 will be an exciting year for Spriter Pro owners.  We already have some amazing unannounced features in the works that we can't wait to share once they're ready to be unveiled.  
    
    I'm currently focused on creating a working, fully featured and well documented reference implementation.  Once finished, this should make creating full Spriter support for any particular authoring system trivial.  And we'll be focusing resources and efforts into helping developers port this to as many languages and authoring systems as possible.  Originally we were going to make this a barebones implementation with support for all Spriter Pro features, but we've decided to take a bit longer and include several implementation and playback features that most developers will want in their arsenal.
    
    Sorry for our slow response times on the forums and tech support during the holidays.  Don't worry, you haven't been forgotten, and we will respond and help you resolve your issues as soon as we can.  We also realize there are a few open bugs with Spriter R2, and we'll do our best to fix them as soon as this implementation is complete.

    On a final note, the Steam Sale ends on January 2nd, so there are only two days left to get Spriter Pro for 50% off.  Also on BrashMonkey.com Spriter Pro and all of our Art Packs and bundles are also 50% until January 2nd using the coupon code HAPPYHOLIDAYS.

    Thank you everyone for a great year, and we look forward to making 2015 an awesome year for Spriter users.

hello, @NowSayPillow. The issue is that pivot points are being changed in the middle of the animation. If your animator isn't trying to change the pivot point, then to fix this:
On the keys that contain pivot point data in the file (12,13,14,15,18,19, and 20 - starting from 0), within Spriter right-click on the pivot point, and choose 'use default pivot point'. That should fix the issue. To avoid this in the future just always use the default pivot point (you can set the default pivot point for an image by double clicking on the image file in the file palette). That should be enough to fix the problem if you just need to get things working as quickly as possible, but I will give some information below on why this is happening (not a bug), and how you can make your engine support the feature, which is very simple.

Spriter has two features: changing pivot points and dynamic reparenting, which work by putting two different sets of transformable data for the same object at the same time. You can seamlessly change pivot points in the middle of an animation, which would normally result in the image suddenly visually teleporting to a new location. You can also seamlessly change an object's parent bone, or add or remove it from the skeleton completely, both of which are usually not allowed mid animation.

To support this in your own engine (feel free to ignore this part if you don't have access to the engine source code or it's developer):
If you're already using the 'object_ref's and 'bone_ref's in the mainline' 'key's to find your individual 'timeline's and 'key's, always tween from the exact 'key' it indicates, and the very next 'key'. The ref's will already point exactly where the data you need is without any further checks.
 
If you're not using the 'timeline' and 'key' tags in the 'object_ref's and 'bone_ref's and are instead running through 'timeline's and 'key's individually and searching for the key at the current time in your code, just make sure you're always tweening between two consecutive keys. For example if you have 4 keys in a row:
<key id="0" time="0"/><key id="1" time="10"/><key id="2" time="10"/><key id="3" time="20"/> If the current time is 5, you should tween between the first two 'key's.
If the current time is 15 you should tween between the last two 'key's.
The only special case is if the time is exactly 10, then rather than just use the data at <key id="1">, if the current time is the exact time of a 'key', then you still check the next 'key' to make sure it doesn't also have the same time. If it does (and it does in this case), then you should use the second 'key'. You don't have to check any more 'key's. The maximum duplicate time 'key's that will appear in a row is 2.

Hi Everyone,
We're pleased to announce that our 4 fully animated Art Packs for use with Spriter are now available on Steam as of 4 pm today. June 4th EST.
In conjunction with their Steam release we're also introducing a new, lower price point for them and all future art packs, not just on Steam, but on our own Web Store and on affiliate stores as well.
Here are previews of all of the currently available art packs, along with their new prices:
Game Effects Pack $12.99 Basic Platformer Pack $24.99 Adventure Platformer Pack $24.99 Run N' Gun Platformer Pack $24.99 In addition to this substantial price reduction, in celebration of their introduction, all art packs are currently on sale on Steam for 50 percent off, making this an excellent opportunity to snatch up these royalty free Spriter animations Packs for your current and future game projects at an unprecedented low price. For those who have already purchased one or more of our full Art Packs from our web store or any of our affiliates (Not Steam) BEFORE they became available on Steam, please keep an eye out in your in-box for an update email (for the Art Packs you purchased) automatically upgrading it to drastically increase your content. Here's what to expect:
If you already purchased the Effects Pack, then you'll receive the Basic Platformer Pack for free.
If you already purchased any one of the Platformer Packs you'll receive all other Platformer Packs for free.
If you already purchased any of the bundles of 2 Art Packs then you'll receive all the other remaining Art Packs and the next Art Pack we release as well for free.
If you purchased the all Art Packs bundle you'll receive all current and all future art packs we release for free. If you purchased more than one art pack, but one at a time you should qualify for numbers 3 or 4 above, then please email support@brashmonkey.com with the details of each purchase and make the subject title of the email “Art Pack bundle equivalent upgrade” (without quotes) And we'll upgrade your product description in our system and send you the additional art packs. If four days from now you still haven't received your automatic upgrade email, please contact support@brashmonkey.com with your original purchase information for your art packs or bundles and make the subject title of the email “Did not receive art packs upgrade” (without quotes) 
In related news, we're currently working on 2 new Animated Art Packs which we plan to reveal more about within roughly a month.
Cheers!

original post edited with 6/28 udpate

Happy New Year!
    This was a big year as we released Spriter 1.0 and are now on Steam.  We also released two new Art Packs, a new promo video, and a new site and forums.  Now that the foundation is set, 2015 will be an exciting year for Spriter Pro owners.  We already have some amazing unannounced features in the works that we can't wait to share once they're ready to be unveiled.  
    
    I'm currently focused on creating a working, fully featured and well documented reference implementation.  Once finished, this should make creating full Spriter support for any particular authoring system trivial.  And we'll be focusing resources and efforts into helping developers port this to as many languages and authoring systems as possible.  Originally we were going to make this a barebones implementation with support for all Spriter Pro features, but we've decided to take a bit longer and include several implementation and playback features that most developers will want in their arsenal.
    
    Sorry for our slow response times on the forums and tech support during the holidays.  Don't worry, you haven't been forgotten, and we will respond and help you resolve your issues as soon as we can.  We also realize there are a few open bugs with Spriter R2, and we'll do our best to fix them as soon as this implementation is complete.

    On a final note, the Steam Sale ends on January 2nd, so there are only two days left to get Spriter Pro for 50% off.  Also on BrashMonkey.com Spriter Pro and all of our Art Packs and bundles are also 50% until January 2nd using the coupon code HAPPYHOLIDAYS.

    Thank you everyone for a great year, and we look forward to making 2015 an awesome year for Spriter users.

Spriter Pro is available on Steam for 75% off until Friday (May 29th) 1:00 PM EST! http://store.steampowered.com/app/332360/ 

Spriter R4.1 Critical Bug Fix:
There was a critical bug in yesterday's build of Spriter that made it so you couldn't edit default pivot points.  I apologize for any inconvenience this may have caused, and here is a new version that fixes the issue.  If you use the Steam version of Spriter, it should automatically update the next time you log in.
This version also contains a fix that may help some Steam users that were experiencing library issues on Linux.  
 
 
Original R4 Update:
Hi everyone,
 
We're pleased to announce the release of Spriter build R4 available for download at www.brashmonkey.com and also as an automatic update on Steam.
 
R4 is the first build to feature the newly updated manual which now covers all core features. R4 also features the long awaited hot-key list, which you can access by pressing Shift+Escape (or through the Help menu).
 
One great new feature introduced in this new build is the ability to copy a specific individual attribute of an object (such as it's x scale, y scale, position, angle, or opacity) and automatically paste to all of its other key frames.
 
This build should also fix a library issue with the 64 bit Linux version. Internal testing shows the Steam version of Spriter Pro now loads properly from Steam with Ubuntu 11.04, but so far we can only get it to run on Ubuntu 14 by launching it directly from it's Steam folder location.  It will not launch directly from Steam itself.  We will continue to look into this and thank you for your patience.
 
Here is the full changelog for Spriter R4:
 
Spriter Release 4
Released 4/22/2015
 
Additions and Enhancements
Updated manual now includes all core features Added Shortcut Key Popup (available in the Help menu, and through keyboard shortcut Shift-Esc) Added the right-click menu option on the canvas to copy a single object attribute (x,y,angle,etc) to every frame (when one object is selected) Export To PNG/Gif window now remembers 'Keyframes Only' setting   
Changes
Minor cosmetic changes Changed Export to PNG Sequence naming convention to use one underscore (myImage_000.png) instead of two (myImage__000.png), as the double underscore was causing issues on certain OS's and API's Bug Fixes
Fixed a bug that made the right click image list for sprites not show up under certain circumstances Removed the 'Program Update' settings from the Steam version, as Steam handles updates and these settings had no effect. We'd also like to take this opportunity to mention some great new Spriter implementations in the works for several popular authoring systems. Here are links so you can get the specific details for each of them. (If we missed any new Spriter implementations, please let us know and we'll mention it in our next update.)
 
Atomic Game Engine (Video) 
 
Overlap 2d
 
Clickteam Fusion  (Video) 
 
We should also mention Spriter2Unity has also been updated to work with Unity 5.
 
 
Speaking of runtimes, we'd like to humbly thank everyone again for your patience as we continue to work on the Spriter Pro reference implementation. As most of you may know, the goal is to provide a fully featured and easy to follow/port Spriter implementation, and the delay is in general because we are making sure the implementation is as flexible as possible, includes several up-coming features and improvements, and makes room for the easy addition of several planned features which will be a big part of Spriter's future. As this full and future-proof implementation develops we're very excited with what it will offer Spriter users, but it's also becoming obvious that there's a conflict between the need to make sure its done carefully and the desire to get it done quickly.
 
For this reason we've decided its best for me to switch gears and make a much simpler reference implementation which perfectly supports all current features (but not the future features) so that people who need to port or finish a Spriter implementation sooner rather than later will have a concise and easy to follow example in the near future. The much more robust implementation will be the focus once the basic implementation is made available to everyone. We will deliver a detailed update regarding this 1.0 feature complete reference implementation within the next 14 days.
 
Cheers,
Edgar at BrashMonkey

Just wanted to link to this on the main forum for anyone who's been waiting on this:
viewtopic.php?f=3&t=12569

We're determined to get this on EVERY major game engine, as well as APIs for easy integration into custom engines built from scratch if there is a demand for it. We will do some ourselves, and some will be outsourced, and free support will be given to anyone who wants to add Spriter animation to any engine. To this end, developer support will be given through this forum, and in the future we will release documentation so anyone can get started on their own. Now that free beta is complete, and we have moved to a super easy to parse XML based format, Spriter will be much more attractive to third party developers, so we expect to see the format expand rapidly.
This list may not determine the exact order we pursue a given platform, but we're interested in knowing how much interest there is for the various platforms, and we can use this information to inform potential third party developers of the audience. Please take a moment to let us know which platform you're most looking forward to.
You can choose up to three options, but please only select those which you think you will actually be using to load your characters. The Construct Classic plugin is feature complete, and the beta version of this plugin will be released shortly after the new beta version of Spriter itself)
Edit:
The following is a list of all platforms where loading and animation playback of the current beta format has been accomplished during this kickstarter. While these implementations will need to be updated before 1.0, it should inspire confidence that your chosen format will be supported:

[*:znscphjp]Cocos2d(by @TacoGraveyard)
[*:znscphjp]GameMaker(by icuurd12b42) http://gmc.yoyogames.com/index.php?showtopic=537492
[*:znscphjp]Flashpunk(by @abeltoy) http://www.brashmonkey.com/spriter/PunkSpriter.swf
[*:znscphjp]Flixel(by @abeltoy) http://www.brashmonkey.com/spriter/FlxSpriter.swf
[*:znscphjp]Starling(by @abeltoy) http://www.brashmonkey.com/spriter/StarlingSpriter.html
[*:znscphjp]AS3(by @abeltoy) http://www.brashmonkey.com/spriter/BitmapSpriter.swf
[*:znscphjp]XNA(by Mark Schmelzenbach) http://www.brashmonkey.com/spriter/SpriterBetaXNA.zip
[*:znscphjp]JBlocks(by Zeroluck)
[*:znscphjp]Libgdx (by Christian Finckler) http://www.badlogicgames.com/forum/view ... =17&t=3863
[*:znscphjp]Love2D(by @mariocaprino)
[*:znscphjp]Torque2D(by @FractalOutlook)
[*:znscphjp]SFML(by mr.wonko) https://github.com/mrwonko/SFMLSpriter/downloads

Hi Everyone,
We're pleased to announce that our 4 fully animated Art Packs for use with Spriter are now available on Steam as of 4 pm today. June 4th EST.
In conjunction with their Steam release we're also introducing a new, lower price point for them and all future art packs, not just on Steam, but on our own Web Store and on affiliate stores as well.
Here are previews of all of the currently available art packs, along with their new prices:
Game Effects Pack $12.99 Basic Platformer Pack $24.99 Adventure Platformer Pack $24.99 Run N' Gun Platformer Pack $24.99 In addition to this substantial price reduction, in celebration of their introduction, all art packs are currently on sale on Steam for 50 percent off, making this an excellent opportunity to snatch up these royalty free Spriter animations Packs for your current and future game projects at an unprecedented low price. For those who have already purchased one or more of our full Art Packs from our web store or any of our affiliates (Not Steam) BEFORE they became available on Steam, please keep an eye out in your in-box for an update email (for the Art Packs you purchased) automatically upgrading it to drastically increase your content. Here's what to expect:
If you already purchased the Effects Pack, then you'll receive the Basic Platformer Pack for free.
If you already purchased any one of the Platformer Packs you'll receive all other Platformer Packs for free.
If you already purchased any of the bundles of 2 Art Packs then you'll receive all the other remaining Art Packs and the next Art Pack we release as well for free.
If you purchased the all Art Packs bundle you'll receive all current and all future art packs we release for free. If you purchased more than one art pack, but one at a time you should qualify for numbers 3 or 4 above, then please email support@brashmonkey.com with the details of each purchase and make the subject title of the email “Art Pack bundle equivalent upgrade” (without quotes) And we'll upgrade your product description in our system and send you the additional art packs. If four days from now you still haven't received your automatic upgrade email, please contact support@brashmonkey.com with your original purchase information for your art packs or bundles and make the subject title of the email “Did not receive art packs upgrade” (without quotes) 
In related news, we're currently working on 2 new Animated Art Packs which we plan to reveal more about within roughly a month.
Cheers!

Happy New Year!
    This was a big year as we released Spriter 1.0 and are now on Steam.  We also released two new Art Packs, a new promo video, and a new site and forums.  Now that the foundation is set, 2015 will be an exciting year for Spriter Pro owners.  We already have some amazing unannounced features in the works that we can't wait to share once they're ready to be unveiled.  
    
    I'm currently focused on creating a working, fully featured and well documented reference implementation.  Once finished, this should make creating full Spriter support for any particular authoring system trivial.  And we'll be focusing resources and efforts into helping developers port this to as many languages and authoring systems as possible.  Originally we were going to make this a barebones implementation with support for all Spriter Pro features, but we've decided to take a bit longer and include several implementation and playback features that most developers will want in their arsenal.
    
    Sorry for our slow response times on the forums and tech support during the holidays.  Don't worry, you haven't been forgotten, and we will respond and help you resolve your issues as soon as we can.  We also realize there are a few open bugs with Spriter R2, and we'll do our best to fix them as soon as this implementation is complete.

    On a final note, the Steam Sale ends on January 2nd, so there are only two days left to get Spriter Pro for 50% off.  Also on BrashMonkey.com Spriter Pro and all of our Art Packs and bundles are also 50% until January 2nd using the coupon code HAPPYHOLIDAYS.

    Thank you everyone for a great year, and we look forward to making 2015 an awesome year for Spriter users.

Please post bugs with Spriter R4 here.

it's a definite possibility for the long term.
good idea. It was already going to have the spinboxes, but that's a good idea. Also, the angle control will have a wheel you can rotate with your mouse.
The current beta does have a 'protected selection' feature. You can drag, drop, and rotate a selected object even if it's behind others. only if you click a sprite on an area that doesn't overlap the currently selected object(s) will it change the selection.
yes, that's in there
yes, the next release will be native UI on Windows, Mac, and, Linux
yes, all of that is planned for the long term, and the groundwork is already layed for those features.
thanks for the kind words, and yes, we do want to work with the community to develop an ecosystem of some sort for both the animators and the developers.
the todolist is huge, but things are going very well on fronts.
working hard on the next version, and loving every minute of it.

Spriter R4.1 Critical Bug Fix:
There was a critical bug in yesterday's build of Spriter that made it so you couldn't edit default pivot points.  I apologize for any inconvenience this may have caused, and here is a new version that fixes the issue.  If you use the Steam version of Spriter, it should automatically update the next time you log in.
This version also contains a fix that may help some Steam users that were experiencing library issues on Linux.  
 
 
Original R4 Update:
Hi everyone,
 
We're pleased to announce the release of Spriter build R4 available for download at www.brashmonkey.com and also as an automatic update on Steam.
 
R4 is the first build to feature the newly updated manual which now covers all core features. R4 also features the long awaited hot-key list, which you can access by pressing Shift+Escape (or through the Help menu).
 
One great new feature introduced in this new build is the ability to copy a specific individual attribute of an object (such as it's x scale, y scale, position, angle, or opacity) and automatically paste to all of its other key frames.
 
This build should also fix a library issue with the 64 bit Linux version. Internal testing shows the Steam version of Spriter Pro now loads properly from Steam with Ubuntu 11.04, but so far we can only get it to run on Ubuntu 14 by launching it directly from it's Steam folder location.  It will not launch directly from Steam itself.  We will continue to look into this and thank you for your patience.
 
Here is the full changelog for Spriter R4:
 
Spriter Release 4
Released 4/22/2015
 
Additions and Enhancements
Updated manual now includes all core features Added Shortcut Key Popup (available in the Help menu, and through keyboard shortcut Shift-Esc) Added the right-click menu option on the canvas to copy a single object attribute (x,y,angle,etc) to every frame (when one object is selected) Export To PNG/Gif window now remembers 'Keyframes Only' setting   
Changes
Minor cosmetic changes Changed Export to PNG Sequence naming convention to use one underscore (myImage_000.png) instead of two (myImage__000.png), as the double underscore was causing issues on certain OS's and API's Bug Fixes
Fixed a bug that made the right click image list for sprites not show up under certain circumstances Removed the 'Program Update' settings from the Steam version, as Steam handles updates and these settings had no effect. We'd also like to take this opportunity to mention some great new Spriter implementations in the works for several popular authoring systems. Here are links so you can get the specific details for each of them. (If we missed any new Spriter implementations, please let us know and we'll mention it in our next update.)
 
Atomic Game Engine (Video) 
 
Overlap 2d
 
Clickteam Fusion  (Video) 
 
We should also mention Spriter2Unity has also been updated to work with Unity 5.
 
 
Speaking of runtimes, we'd like to humbly thank everyone again for your patience as we continue to work on the Spriter Pro reference implementation. As most of you may know, the goal is to provide a fully featured and easy to follow/port Spriter implementation, and the delay is in general because we are making sure the implementation is as flexible as possible, includes several up-coming features and improvements, and makes room for the easy addition of several planned features which will be a big part of Spriter's future. As this full and future-proof implementation develops we're very excited with what it will offer Spriter users, but it's also becoming obvious that there's a conflict between the need to make sure its done carefully and the desire to get it done quickly.
 
For this reason we've decided its best for me to switch gears and make a much simpler reference implementation which perfectly supports all current features (but not the future features) so that people who need to port or finish a Spriter implementation sooner rather than later will have a concise and easy to follow example in the near future. The much more robust implementation will be the focus once the basic implementation is made available to everyone. We will deliver a detailed update regarding this 1.0 feature complete reference implementation within the next 14 days.
 
Cheers,
Edgar at BrashMonkey

Please post bugs with Spriter R4 here.

Hi Everyone,
We're pleased to announce that our 4 fully animated Art Packs for use with Spriter are now available on Steam as of 4 pm today. June 4th EST.
In conjunction with their Steam release we're also introducing a new, lower price point for them and all future art packs, not just on Steam, but on our own Web Store and on affiliate stores as well.
Here are previews of all of the currently available art packs, along with their new prices:
Game Effects Pack $12.99 Basic Platformer Pack $24.99 Adventure Platformer Pack $24.99 Run N' Gun Platformer Pack $24.99 In addition to this substantial price reduction, in celebration of their introduction, all art packs are currently on sale on Steam for 50 percent off, making this an excellent opportunity to snatch up these royalty free Spriter animations Packs for your current and future game projects at an unprecedented low price. For those who have already purchased one or more of our full Art Packs from our web store or any of our affiliates (Not Steam) BEFORE they became available on Steam, please keep an eye out in your in-box for an update email (for the Art Packs you purchased) automatically upgrading it to drastically increase your content. Here's what to expect:
If you already purchased the Effects Pack, then you'll receive the Basic Platformer Pack for free.
If you already purchased any one of the Platformer Packs you'll receive all other Platformer Packs for free.
If you already purchased any of the bundles of 2 Art Packs then you'll receive all the other remaining Art Packs and the next Art Pack we release as well for free.
If you purchased the all Art Packs bundle you'll receive all current and all future art packs we release for free. If you purchased more than one art pack, but one at a time you should qualify for numbers 3 or 4 above, then please email support@brashmonkey.com with the details of each purchase and make the subject title of the email “Art Pack bundle equivalent upgrade” (without quotes) And we'll upgrade your product description in our system and send you the additional art packs. If four days from now you still haven't received your automatic upgrade email, please contact support@brashmonkey.com with your original purchase information for your art packs or bundles and make the subject title of the email “Did not receive art packs upgrade” (without quotes) 
In related news, we're currently working on 2 new Animated Art Packs which we plan to reveal more about within roughly a month.
Cheers!

(update 10/18/2015) The first official reference implementation is ready for testing. More information here.