There's quite some open source graphic design work out there already. You can also use the open source Font Awesome to generate nice app icons. There even is a

There's quite some open source graphic design work out there already. You can also use the open source Font Awesome to generate nice app icons. There even is an open source python script to do that: https://github.com/odyniec/font-awesome-to-png https://github.com/odyniec/font-awesome-to-png