A Raspberry Pi Twitterbot which can tweet selfies, random messages and sensor data, because why not!
It uses a Raspberry Pi B+, a Sense HAT and a Pi Camera, although you don't need anything more than a Raspberry Pi to do the basics.
Its Twitter account can be found here: @piserver2015
Want to learn more about this project? There's an article about it here: http://qeprize.org/createthefuture/twitter-bot/