The primary site:

http://mcrypt.hellug.gr/index.html

Mirrors of this site:

http://mirror.schell.de/mcrypt.hellug.gr/index.html

Archives of mcrypt:

ftp://argeas.cs-net.gr/pub/unix/mcrypt/
http://the.wiretapped.net/security/cryptography/libraries/mcrypt/
ftp://gd.tuwien.ac.at/privacy/mcrypt/
http://gd.tuwien.ac.at/privacy/mcrypt/

Binary rpms for linux in ftp.fazekas.hu
Binary rpms for linux in devel.pluto.linux.it