GUI

• http://lib.haxe.org/p/basis
• http://lib.haxe.org/p/stablexui
• https://github.com/ianharrigan/haxeui
• https://github.com/comanjoni/zajac
• https://github.com/impaler/Omni-Components/tree/dev#readme

MVC (MVP, etc) libs - http://lib.haxe.org/p/mmvc - http://lib.haxe.org/p/prime-mvc

2D engines

• http://lib.haxe.org/p/polygonal-zz
• https://github.com/ncannasse/h3d
• http://lib.haxe.org/p/createjs

3D engines

• https://github.com/ncannasse/h3d
• https://github.com/labe-me/haxe-three.js
• https://github.com/AxGord/hx-unity3d
• https://github.com/proletariatgames/HUGS (unity3d + c# bindings)

Game engines 2D

• http://lib.haxe.org/p/HaxePunk
• http://lib.haxe.org/p/flixel
• http://lib.haxe.org/p/flambe
• http://lib.haxe.org/p/gm2d
• http://martamius.github.io/Firmament.hx/
• http://www.stencyl.com/
• https://github.com/alamboley/CitruxEngine
• https://github.com/ralcr/cocos2d-haxe
• https://github.com/PixelPounce/Spur
• https://code.google.com/p/awe6/
• https://github.com/dionjwa/Hydrax
• https://github.com/nadako/Ash-HaXe

Skeletal animation engine

• https://github.com/nitrobin/spinehx
• https://github.com/SlavaRa/dragonboneshx3

Physics engines 2D

• http://lib.haxe.org/p/nape
• http://lib.haxe.org/p/polygonal-motor
• http://lib.haxe.org/p/box2d