Smart Soluciones Int
Smart Soluciones Int reviewedIconshockOver 2 million free icons in 400+ icon sets over 30 styles
 Recommended
Pros: 

lots and lots of icons to search ! very high quality

Cons: 

a bit hard to select the style you want due to so categories

Nice icon search tool with lots of features, you can edit on the fly and it has a huge amount of icon fonts