by Spacejock Software
WinXP & above / Mono 2.4 & above
yEdit2 is a simple text editor with frequent auto-backups and a countdown word counter.
(I've not had time to write a description for this app, so I've copied & pasted my post from the NanoWrimo forums below)
I found it easy to set it up with 500 words and then type as quick as possible until I'd done them all. Music on the headphones helped, and Nano 2007 was the easiest I've ever done.