We can use URL shorteners for URL for link redirection, link masking and to make a long URL short. I have a good list of 50+ URL shorteners.

(1) goo.gl
This URL shortener is from Google, it provides analytics. some other useful features.

(2) Linkbee
Linkbee is now lnk.co, you can make money by this softener, it provides analytics too, if you are logged in.

(3) mcaf.ee
This shortener is form MCafee, MCAfee is an antivirus maker so you can trust on them and share a secure URL.

(4) j.mp
This is from Bitly. Bitly is pioneer in URL shortening services.

(5) ziprl
You can short URL and set a password, set tag and link expiration date.

(6) Mislead
A simple URL shortener no other things yet.

(7) Crumbs
Custom URL shortetning with password protection and visitors limit.

(8) 2truth
It is also a simple URL shortener.

(9) cli.gs
You can know your visitors and traffic analytics and search engine friendly.

(10) Tweetburner
Inspired with Twitter.

(11) Tiny
Simply shorten, track and manage your URLs.

(12) su.pr
This is from stumbleupon.com. You need to sign up to use this service.

(13) to.ly
Simple URL shortener, there is Firefox Add-on available.

(14) fon.gs
A simple URL shortener with custom link.

(15) twi.gy
They say simple links bring more followers.

(16) bi.gl
Just short it.

(17) go2.tl
Just go to it.

(18) byze
Another good URL shortener.