BigTweet installs as a bookmarklet to all major browsers and lets you post to Twitter from any Web page. It can automatically capture the page link (built in URL shortening available), title and any highlighted text. It also lets you include special Unicode characters and post up to 240 characters (2 formatted sequential tweets) when needed. A mode control lets you switch between 140 and 240 character modes.

This Greasemonkey Firefox add-on runs on the main Twitter home page, on the Update text entry box. Continuously checks for...
Twitter Friends' Bios at a Glance is a Greasemonkey browser add-on that allows you to quickly review many Twitter user...
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