Cocos2d-X
http://cocos2d-x.org/
C++跨平台游戏开发框架

Image Alpha
http://pngmini.com/
Png 图像压缩

Tiled Map Editor
http://www.mapeditor.org/
区块地图编辑器

Particle Designer
http://71squared.com/en/particledesigner
粒子编辑器

Particle Editor online
http://onebyonedesign.com/flash/particleeditor/
在线粒子编辑器

particle2dx
http://www.effecthub.com/particle2dx
EffectHub Cocos2dx 特效编辑器

Glyph Designer
http://71squared.com/en/glyphdesigner
字体设计器

Sprite Helper
http://www.gamedevhelper.com/spritehelper/
精灵辅助设计

Level Helper
http://www.gamedevhelper.com/levelhelper/
关卡辅助设计

Texture Packer
http://www.codeandweb.com/texturepacker
贴图压缩

Physics Editor
http://www.codeandweb.com/physicseditor
物理编辑器

ShoeBox
http://renderhjs.net/shoebox/
Sprite/UI tools

Shader Forge
http://acegikmo.com/shaderforge/
可视化 shader 编辑器

FMod
http://fmod.org
音效引擎