Roundup : MyCleenr, Tinker, AddTweets, BigTweet, Twitlet
MyCleenr - remove people you follow based on their last tweets
Tinker - turns a keyword or hashtag search into a nice stream that resembles a profile page rather than search results. When you create an event stream you can filter out keywords (even keywords by specific users) and even limit the whole stream to particular tweeps (so basically you can make a public group stream). Each event page has takeaways like an embed code and an RSS feed. If you register you can follow an event (just like following a tweep). You also get a profile page. Here’s an enterprise 2.0 event.
Add Tweets - add a javascript box to your site
BigTweet - a bookmarklet, also see TwitSnip, TweetMyPage, TwitThis
Twitlet - yet another bookmarklet
BONUS
Good To The Last Tweet: Coffee Machine Drips Updates To Twitter













