Application Icon Set is a freebie that consists of 120 highly professional icons and is great for those that are looking for a varied icon set. These icons are based on programs and applications like Facebook, twitter, and Google chrome.
The pack comes in a variety of formats liek PSD and PNG and sizes like 16×16 and 32×32. This set could be used for graphic designs, apps, and other creative projects all for free as long as you give credit to the author.