Collection of open source fonts for mobile apps

Ben Sperry is the creator of Ionicons:

We intend for this icon pack to be used with Ionic, but it’s by no means limited to it. Use them wherever you see fit, personal or commercial.

If you are looking for a nice set of icons, I highly recommend you take a closer look. Ionic is an interesting project in its own right:

Ionic is a beautiful front-end framework for developing hybrid mobile apps in HTML5.