Named Proxlet, it will let you do everything from filtering certain hashtags and blocking unwanted apps to outright muting users that are getting on your nerves. Proxlet works with lots of different Twitter clients already. These include TweetDeck, Twidroyd, Spaz and Seesmic (for Android). In other words: it works both with desktop and mobile clients. Best of all, using Proxlet costs nothing. If the above description sounded interesting, then you might as well head to the site and install the provided Google Chrome extension. And if you use a different browser, then that is no reason to worry – support for plenty more is underway. You can even help the guys behind Proxlet test it out, in fact.