Bought a Raspberry Pi B+ recently. It's always on and always online.
Currently, it only runs an IRC client and a simple TODO tool.
At first, I didn't care much and installed raspbian. I'm a spoiled
child, though, so it didn't take long until I switched to the ARM port
of Arch Linux. Much better and a lot faster.
As IRC client, I use WeeChat, but I don't think I'll keep it. It's
rather slow on a Pi.
The TODO tool is just a small script around ed(1):