The NanoPi NEO is another fun board developed by FriendlyARM for makers, hobbyists and fans and costs $8. It is based on Allwinner H3, Quad-core Cortex-A7 Up to 1.2GHz and comes with DDR3 RAM: 256MB/512MB versions and USB and Ethernet connectivity.
NanoPi NEO is an $8 Ubuntu board – [Link]
http://hackaday.com/2016/07/13/another-small-linux-computer-with-pi-in-its-name/