What is the Onion Omega?
Well its a kick-ass little computer straight out of a Kickstarter campaign Onion Omega. The device about 1/4 the size of a Raspberry Pi that has built-in WiFi, Network connection (via pins or expansion board), USB 2.0, I2C bus and a 15 pin GPIO header.
Also check out the https://onion.io/ website for more info