Iconic Icon Set
103 Icons for free in two different formats — raster and vector. Iconic comes in 14 different colors. So you can easily choose the right color that matches your color scheme.
Free Set of Office Icons by IconShock
Designed by IconShock, this set of icons has 5 icons of commonly used office items. Available in both PNG and AI format.
Download: Vandelay Design
License: Free for personal and commercial use
Vector Social Media Icons
This is a set of 50 social media icons. Icons are available in 2 different sizes and 3 different formats — PNG, GIF and EPS.
License: "You may use or modify the icons for any purposes. However, you may NOT resell or distribute the icons. If you use these icons, please place a link to http://icondock.com"
330 Free Letter Pressed Icons
Download: Creative Nerds