Bored.com - Links to the most fun and interesting web sites on the Internet.
Comedy Zone Links Directory - Huge database of humour sites!
eXtreme Jokes Humor Portal - A large searchable directory of humor and joke related web pages. Also provides funny cards, pictures and jokes to send to your friends.
FunFool.com - Large directory of humour sites.
HumorLinks - The largest humour links directory on the net.
The Humor Directory - Links to the best humour sites out there, add yours now!