Here i have listed 18 site that give service to short your url. Choose which one you like.
http://2isp.com
http://tinyurl.com/
http://w3t.org/
http://lix.in/
http://sturly.com/
http://urlprune.com/
http://rarme.com/
http://doiop.com/
http://rapidlayer.in/
http://myref.de/
http://link-protector.com/
http://www.lil-link.com/
http://urlite.com/
http://protect-links.com/
http://snurl.com/
http://lil-links.com/
http://rapidbolt.com/
http://snip-it.com/
Enjoy.............