Mail Chess - Offers a free a multi-featured program which works under Windows 95/98/ME/NT/2000/XP and supports correspondence chess through e-mail. - http://www.mailchess.de/mce.html
Correspondence Chess Place - Offers articles and resources for the correspondence chess player. - http://www.correspondencechess.com/knudsen/index.htm
Correspondence Chess News - Offers free bi-weekly magazine relevant to news about correspondence chess including interviews, and annotated games. - http://ccn.correspondencechess.com/
Ectool - Shareware program to help with the management of playing correspondence or email chess. - http://www.ectool.nu/
Correspondence Chess Starter Kit - How to get started in correspondence chess. - http://www.correspondencechess.com/knudsen/nut/05.htm
Ralph Marconi's Chess Page - Contains match information. - http://correspondencechess.com/marconi/cantf.index.htm
Stephan Busemann's Correspondence Chess Page - Stephan Busemann is CC-GM and has among other things a nice summary of the discussion on the usage of computer programs in CC play. - http://cl-www.dfki.uni-sb.de/~busemann/schach.html
Email Chess and Chess Art - Mostly dedicated to play-by-email chess. Also features images of chess in art, advertising, and postage stamps. - http://chess.kearman.com/
The Campbell Report - Chess Correspondence articles, and information. - http://www.correspondencechess.com/campbell/
Chess Mail - Commercial magazine with chess news, articles, and game analyzations. - http://www.chessmail.com