URL/link shorteners like TinyURL are very popular among the internet users to share long links over SMS, comments, email, IM, micro blogging, short URL redirection, domain redirection, URL forwarding and other contexts.
Bit.ly, a new URL shortening service from the innovation network Betaworks, a more intelligent URL shortening and farwarding service over the cloud computing.
You can keep tracks on your shortened and shared links with bit.ly. It updates the geolocation, traffic and the referral history of your links. If you are tweeting or sending any link via sms then bit.ly would be great idea to use.
for example the following long link
http://pak9ga.bay.livefilestore.com/y1p-SFf86wFwCrMIYOpTRpGrGMhFEnW 2wLEwWQS95Ieog5qYBCHn4_bNUixqGILZzEKY3peQS52XYONphz9imZTvg/Carve%20your%20name%20here.execan be compressed to http://bit.ly/8OPB1. You can see the information about click through, geolocations and referrals by placing a plus sign (+) just after the URL eg http://bit.ly/8OPB1+.
Bit.ly better than tinyURL.com and it is free form annoying ads.
See the graph (more info) describing the decreasing of the popularity of tinyURL since the arrival of bit.ly.
Some more URL shorteners :
Google recently launched it's url shortener goo.gl which is currently available for Google Apps. Now feedburner is utilizing goo.gl to tweet feeds automatically. Do you know any other URL shortener?Shekhar Sahu
UPDATE : Twitter Announced it's own URL Shortener twee.tt