John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
Muzei - Muzei is a live wallpaper that gently refreshes your home screen each day with famous works of art.
MyChat - Secure instant messenger for any network
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
BORGChat - BORGChat is a LAN messaging software program.