Font Awesome Copy & Paste
The iconic font designed for use with Twitter Bootstrap Home → http://fortawesome.github.com/Font-Awesome/
We Love Icon Fonts
This is a free & open source icon fonts hosting service (like Google Web Fonts, but icon fonts only). Hurray!
iconmonstr
«[…] The icon(s) can be used freely in both personal and commercial projects with no attribution required, but always appreciated. […]»
The Noun Project
The Noun Project collects, organizes and adds to the highly recognizable symbols that form the world's visual language, so we may share them in a fun and meaningful way.