We have introduced some Free iPhone Icons for developers a week ago. They are designed and carefully optimized for use on toolbars and tab bars in iPhone apps. You can find them in AI and PSD formats.
Now we have some Free Android Icons for developers. The package includes 30 PNG menu icons plus the additional source files for further customization. All icons are distributed under a Creative Commons Attribution Share Alike license. Feel free to use them in any form in your projects or even remix them.
License: Creative Commons License