iphone - Tools for generating texture atlases/sprites from source images?

Is there an industry standard file format for texture atlases?

What are the apps that take a directory of images and turns it into a texture atlas png and a text file describing what's on it?

This is primarily for use in OpenGL iPhone/Objective-C, but it seems like there ought to be a standard across many platforms. I can create these by hand or by writing a script to simply tile them, but it seems like there would be some tools already made for this.

Answer

I would recommend Zwoptex. I think it would do exactly what you want for your iPhone game. And if you have not tried cocos2d yet, Zwoptex is supported by it.