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):

   1   #!/bin/bash
   2   d=~/sgratch
   3   [[ -d "$d" ]] || mkdir "$d"
   4   cd "$d"
   5   [[ -d .git ]] || git init
   6   ${EDITOR:-ed} sgratch
   7   git add sgratch
   8   git commit -m 'sgratching'

 That  is,  it opens a file in ed and automatically commits that into a
 git repo upon exit. It's a lot faster than using vi -- and  more  fun.
 :-)