Seems there are a couple of libraries available for the Haxe/OpenFL/HaxeFlixel platforms that I've found:
OpenFL:
https://github.com/loudoweb/SpriterHaxeEngine
HaxeFlixel (for latest dev build?):
https://github.com/Beeblerox/SpriterHaxeEngine/
HaxePunk:
https://github.com/ibilon/HaxePunk-Spriter
NME (OpenFL?):
https://github.com/po8rewq/hxSpriter
I'm trying to get the HaxeFlixel one to work but is lacking in noob friendly documentation. If anyone gets it to work, please post how you did so here.