Iconfinder provides high quality icons for webdesigners and developers in an easy and efficient way. The site launched in 2007 as the first search engine focused on icons.
Anyway, I don’t want to talk with ou about the site, but about a section on this website, where you will find 100000 free icons to downlaod and use them as you want. All these icons are available on the follwing link :
http://www.iconfinder.com/free_icons
Some icons that you will able to find on iconfinder
logo Icon Finder
