Tango Desktop Project is a resource for anyone. Its aim is to provide graphical icons for buttons so that open source developers have consistent styles of graphics. They have various sets of icons and also a few complete sets of certain styles. The well known GIMP editor uses these icons as well. Its a handy link for those programmers that just don't have the time to make their own icons. Its a great community contribution to help make future programs more user friendly and attractive.
They have a large library of extensive sets of icons that have consistant styles
Below is a picture of one of their complete sets. (They have small and large sizes too!)


