Box2D is getting more and more popular among developers, and I am proud to have the permission to publish the first source code for a complete Box2D game.
The author is Esteban Gallardo, author of Free Creation Games.
The game is called Phyballs
And this is the source code.
I have to say, this is the most complete source code I have ever seen. Inside the package you will find a pdf file with the description of how is organized the library of the game, a flow diagram showing you the class structure, and even the php files to insert and list records for highscores management. And more stuff, such as the level editor.