The SDF Public Access UNIX system is pretty cool! Its the only
place I've seen where you can use ICQ at the UNIX shell. Besides
that, their free account gives you 10 megs of disk space and a
subdomain URL! Making an account was really easy, you just
telnet to sdf.lonestar.org and login as visitor. Once you
make your account, you are instantly able to login. You can
use all the UNIX utilities.
Try it out: http://freeshell.org
They got their start in 1987 and their following is international!