Android Icons - Androidicons is a professional, handcrafted icon set with 250 icons in 14 different colors and 5 sizes, including an icon font and all sources.
Fount - Identify web fonts on any site
Octicons - Your project. GitHub's icons.
Find my Font - Identify any free or commercial font with your camera!
WebHostingHub Glyphs - High quality icons that are easy to use with Bootstrap, other CSS frameworks and in any web projects.
Fonts Ninja - Try fonts discovered on websites in any design software