This will not be a list of 2 million links to sites which have as little actual content as mine or less. There are only a few great Animorphs sites out there, and as I mentioned on my main page, they are down being redone at the moment.
The Chee DataBase: This is/was my favorite Animorphs site, because of the great fanfics, morphing theories, and the best, busiest messageboard.
MORPHz: Very cool layout an' all that stuff, but the coolest thing about this site is the newest news info.
Guardian's Useless Animorph Homepage: Guardian is the weirdest, most bizarre fanfic writer I know. If you love odd Animorphs fanfics, go here. And read the one(s) about #Animorphs! That's Chee-Dolus's chatroom, located at irc.dragonfire.net port 6667 channel #Animorphs. We're weird in there.