I used to go there alot. Haven't been in a long time though.
Some of my favorites include:
Anything by Legendary Frog (The One Ring series, the FF Tribute, ect..)
Links Quest for Ass
The Punk-O-Matic game was insanely fun.
The X-Men spoofs by Wogoat were really good
The Balloon Duel remake was really fun as well.