What is Fontello?
Tool to build custom fonts with icons.
Comments and Reviews
Said about Fontello as an alternative
Disagree with the comment above. It's definitely a Font Awesome alternative. Font Awesome isn't just a source of icons but mainly a font itself. You can create your own custom icon font with only the icons you need.
Icon fonts can be notoriously bad for accessibility since they're often large and fail to load over slow connections. This tool lets you create tiny fonts with only what you need making icon fonts actually usable