Source: http://linuxgizmos.com/tiniest-linux-com...

At 25 x 25mm, or just under a square inch, the VoCore module beats out even the 39 x 22mm Newton. It sells for $20, or $40 to $45 with a dock that extends the Ethernet and USB interfaces. The VoCore is expected to ship in October with full schematics and source code.

The VoCore is a fully functional, 2.4GHz WiFi router, and it can also act as a general purpose low-power (about 200 to 220mA) COM for IoT applications. Potential projects are said to include adding WiFi to USB-enabled devices such as printers, scanners, storage devices, or cameras, as well as Arduino gizmos. According to the developers, it can also drive a remote control robot with camera, or form the basis for a portable VPN router, home automation device, wireless speaker, or offline downloader.