2) dot.tk offers free domain names in the form of "yourname.tk". Includes URL redirection and forwarding service. http://www.dot.tk/ . Posts adds though a 15 sec one and the redirects to to your site.
3) CO.NR Free Domain Name project was developed to provide Free Domain Names or Free Subdomain of .CO.NR domain name to those who wish to get a cool and free domain name, free subdomain or free short URL, that looks like a real paid domain name http://www.freedomain.co.nr/
These are the three best free domain name server sites i have used .