Minify recognizes any URLs in what you are typing and automatically shortens them using the is.gd service.

Replace short and meaningless tinyurls with the domain of the actual web site using the preview feature, now works on all websites.

Submit any page to a url shortening service

One-click instant inline preview of TinyURL urls that show up on FriendFeed, usually included in Twitter messages

Automatically changes all tinyurl links to preview.tinyurl, so that you know where they are trying to send you.

Removes <b> tags so you don't get bold text copying the link

In twitter.com: replace short and meaningless tinyurls with the domain of the actual web site using tinyurls' preview feature.

Get a TinyURL formed of JavaScript prompt dialog

Multi tool for everything on the web, the web's swissknife.

Generate tiny urls from all links on a page

Reveals destination URLs hidden by TinyURL