URL Shortening Services to Shorten Your URL|Links

URL shortening is a technique on the World Wide Web in which a Uniform Resource Locator (URL) may be made substantially shorter in length and still direct to the required page. This is achieved by using an HTTP Redirect on a domain name that is short, which links to the web page that has a long URL
Example
Original URL:
http://lodge4hacker.blogspot.com/2011/07/next-generation-domain-naming-system.html
Shortened URL:
http://tinyurl.com/3dr8x33

List of best URL Shorteners
TinyURL
TinyURL is probably the most famous of all the URL shortening sites out there, but many people don’t take advantage of two key features they offer. The first - Incorporating a one-click bookmarklet on your browser, so you never have to visit the site to shorten a URL, just click a button on your browser and it’s done!

Bitly
Bitly helps you collect, organize, shorten and share links. Currently reinventing how people discover and share content on the web. It is available via website, browser extensions, mobile web, and numerous third-party tools integrated with our open public API.

Google URL Shortener
Google URL Shortener at goo.gl is a service that takes long URLs and squeezes them into fewer characters to make a link that is easier to share, tweet, or email to friends.

is.gd
is.gd is a free service for shortening web addresses and other URLs. This is useful in many circumstances e.g. when sending an address to a phone via SMS and character count is limited.

Ow.ly
Ow.ly is a URL shorterner from the makers of HootSuite. Ow.ly also plans to open up APIs for developers to integrate

Why Should I Shorten My URLs?