Having the right icon set can make or break a web development project. Confusing icons will frustrate users and drive them away from your application. There is no excuse for using ugly icons or even no icons at all on your web application.
For my last few projects I’ve been happily using an icon set called Fugue. Available under a Creative Commons Attribution 3.0 license, the Fugue icon set is fantastically sharp looking and contains a broad array of icon types. Yusuke Kamiyamane, Fugue’s designer, updated the icon set as recently as July 3, 2009. As of today, Fugue is at version 2.2 and contains 2,200 icons. If you don’t wish to include an attribution on your site, you can purchase a royalty-free license for $49.95 USD.
An alternative to the comprehensive Fugue icon set is Diagona, also by Yusuke Kamiyamane, which contains a mere 400 icons. You can purchase a royalty free license to Diagona for a meager $9.95 USD.
Runner up to Fugue is the always popular Silk icon set by Mark James. Silk contains 700
.png icons completely free of charge. That’s $0.00 USD people. Can’t beat that. Silk is also available under a Creative Commons Attribution 3.0 license and is currently at version 1.3.
Please let me know if you have any other favorite icon sets that you use for your projects!