Feather Icons - Simply beautiful open source icons
Icon Generator - Icon Generator is a little application built on AIR that lets you generate a CS5 or Web 2.
Animated Icons from Icons8 - Massive collection of full-motion animated icons to make your project shine
Icon Slate - Icon Slate lets you easily compose, import and export desktop icons in many formats.
IconStore - Free icon packs by first-class designers
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.