Tiny Core Linux is a 16 MB graphical Linux desktop. It is based on a recent Linux kernel, BusyBox, Tiny X, Fltk, and Flwm. The core runs entirely in memory and boots very quickly. The user has complete control over which applications and/or additional hardware to have supported, be it for a desktop, a nettop, an appliance or server; selectable from the project's online repository.

• Tiny Core Linux 17.0
• Tiny Core Linux 15.0
• Tiny Core Linux 14.0
• Tiny Core Linux 13.0
• Tiny Core Linux 12.0

Fantastic! Why? It's the lightest possible linux. You can basically install it on anything that's an electronic device. They have many projects available to help you as well! I am honestly surprised no one has created/sold a phone that has tiny core at it's heart!