Zwicon - A simple, carefully designed collection of icons
Mosaic - Mosaic provides brands with solutions to store and categorize their digital graphic and photography files for quick and easy retrieval.
Eva Icons - 480 Open Source icons for common actions & items
Wunderman - Combining creativity and data, Wunderman is a leading digital agency with 200 offices in 70 countries. Headquartered in New York, Wunderman is part of WPP.
Material Design Icons - 750 Free open-source glyphs by Google
Relevant - Get a glance of your favorite apps and websites in one place