Someone linked me to a Befunge derivative called Wierd the other day, which I think is pretty cool. Instructions are specified by the angle at which the line of symbols is traveling.
hello world http://catseye.mine.nu:8080/projects/wierd/eg/hello.w
quine http://catseye.mine.nu:8080/projects/wierd/eg/quine.w
Got any favorites? Preferably something a bit more interesting then Brainfuck. :)
Another relevant thread:
http://4-ch.net/code/kareha.pl/1104544798