IcoMoon

IcoMoon was first built and released back in the November of 2011. Since its release, it has changed the way icons are being used in web today. IcoMoon introduced the first custom icon font builder, which allowed selecting icons and converting them to fonts.

IcoMoon is constantly improving and it offers many unique features. IcoMoon is the only online service that generates crisp, pixel perfect icon fonts. To achieve this, the icon font generator takes the grid size of each icon into account, and uses a proper alignment.

With over 5000 open source and free icons available in IcoMoon's library, and by allowing you to generate crisp icon fonts and SVG sprites locally/offline, this service is far ahead of any similar one.