Meet VoCore2: an open source Linux computer that acts as a wireless router. It is smaller than a coin and works as a VPN gateway for network security. You can use it to play music, store photos in your own cloud and do a whole lot more. VoCore2 is an open hardware capable of running OpenWrt on Linux. You can code for it in C, Java, Python, and other languages.
VoCore2 has a Mediatek MT7628AN MIPS processor @ 580 MHz, 128 MB of RAM, WiFi, Ethernet, and everything you need to get started. You can find more info about this project on Indiegogo.