Free And High Quality Icons: Function Icon Set

Function Icon Set is a set of 128 high quality icons in PNG format.

Sizes of these free icons are 48*48px

The set includes:

• Social bookmarking icons
• Speech icons
• Folder icons
• User icons
• Credit card icons
• & more..
  
  Website: http://wefunction.com/2008/07/function-free-icon-set/