There are many ways to contribute to the cocos2d project, for example:
* sending patches
* fixing bugs
* opening bugs
* suggesting features
* testing beta versions
* helping people on the forum
* and also, you can contribute financially :-)
This is the Store page , where you will be able to canalize your contribution in different ways:
* donating to the project
* buying the Sapus Tongue source code
* buying a cocos2d t-shirt
For those who don't know it, I'm working full time cocos2d, and my current income consists on donations and the sales of Sapus Tongue source code.
Thank you for your support.