Tentacle.Net is a free server for individuals and non-profit organizations. As a tentacle.net user, you have access to:
Email with no sending/receiving limits
Unlimited mailing lists
A shell account with all of the privileges thereof
A personal web site with PHP and CGI enabled
Unlimited virtual domain hosting
PostgreSQL and MySQL database access
Development environments for C/C++, Java, Perl, Ruby, and others
Complete disk redundancy (RAID-1) with frequent backups
A powerful server, with fast disks, lots of RAM, and a fast CPU
And it's completely free. Forever.