CocosBuilder is free to download and use!
To use CocosBuilder you will need to download both the application and the example files (which includes the CCBReader). Apart from these binary downloads, it is also possible to get the very latest version from GitHub.
Version 2.1 is the latest stable and recommended version to download. You should use this version of CocosBuilder with cocos2d-iphone v 2.0 or later. Some minor bug fixes related to CocosBuilder may require that you get the latest version of cocos2d from GitHub (develop-v2 branch) If you are updating from version 1, please see the migration guide.
Version 3 alpha5
Download CocosBuilder JS Example Games (CocosDragonJS and CrystalCraze)
Note! The example games will run in either CocosPlayer, in web-browsers (Select Run in Browser from the File menu – Chrome is recommended) or as targets in the cocos2d-iphone and cocos2d-x projects (you will need to publish the projects first).
Use version 1.0 of CocosBuilder only if you are still using cocos2d 1.x. Later versions have a lot more features and are much more stable. CocosBuilder 1.0 is not tested on Lion or Mountain Lion.