Showing fanlistings under the Computer Miscellany & Internet category...
Dot Nu: .NU Tld
I love .nu because it's short, and has a lot of good names still available. :)
Can Has?: Memes
MEMES. That is all.
Drawing With Friends: Oekaki Boards
Back in the early 2000's I used to draw on Oekaki Boards frequently. Unfortunately they are kind of an endangered species now, since major browsers are dropping support for java. There are a few that are still alive and kicking, though :)
Alpha Transparency: PNGs
The format I use most for graphics and whatnot :D