Below are links to various PBEM (play by e-mail) sites

World of Cerelia: This site is for a PBEM run by a friend, set in the custom world of Cerelia

The Tower of Zepharon: This page is for a PBEM in which I am currently playing, set in the custom world of Terrene. I highly recommend visiting. It is the most complete and well put together custom world I have yet seen and also a very well run PBEM by an excellent DM.