TweepMeUp is a mashup that lists 3 categories of tweets from Twitter: http://tweepmeup.com/

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Is Following is an appli similar 2 DoesFollow, that shows u if a particular Twitter user is following another user. http://isfollow.com/

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Tweefight, from the creators of Tweefind, enables you to take on your Twenemies on Twitter! http://ping.fm/pCqEB

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With ShoZu, you can post your photos directly to Twitter, you can Tweet and see your Replies. http://www.shozu.com/

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FollowMeButton is a Twitter app to generate Twitter Follow badges. http://ping.fm/GNyjx

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scr.im is a spam-free method for sharing email address in public forums like chat, Twitter, Facebook, etc. http://scr.im/

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Twitter Background Checker is a nifty little application that shows how ur Twitter background looks @ different resolutions.http://twtbg.me/

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Top Follow Friday displays statistical information specific to #FollowFriday. http://ping.fm/Aicbd

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FollowFridays is a website dedicated to displaying a live stream of tweets specific to #FollowFriday. http://ping.fm/bfaVw

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twazzup is a real-time Twitter Search Engine that not only displays the search results. http://www.twazzup.com/

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OneRiot is a social media search engine for Twitter. http://www.oneriot.com/

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Social Mention is a social media search engine that searches user-generated content such as blogs.... http://ping.fm/ZJ8wt

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Bitter a social networking tool that allows u 2 post 2 & get messages from Twitter, Plurk, Pownce & Friend Feed. http://bitterware.com/

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LoadedWeb catalogs Twitterers from US, UK, Canada, Australia, and New Zealand. http://ping.fm/FJWX4

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TwitZap is web-based Twitter client that introduces some new features over what u see in standard Twitter Web client. http://unhub.com/za60

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bbtweet is an open-source BlackBerry Twitter appli that aims 2 integrate Twitter into the standard BB API. http://ping.fm/QpfgI

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Geofollow is a Location Based Twitter Directory. http://geofollow.com/

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