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The ultimate guide to Twitter applications has been an idea many people have had. In fact, I even blogged about trying to start one with other Twitter bloggers back in January. But now Laura Fitton (@pistachio) and an engineering team have unveiled oneforty (no relation!) which is effectively the Twitter version of the iPhone app store.

Sign in with OAuth, and you can fill out your profile, including listing your favourite Tweeters etc. The site will automatically list any applications it picks up from your account – and then you can start finding and adding any others that it might have missed.

badgergravling on oneforty

There’s a curated list of Essential Applications, Most Popular, and the ability to suggest apps that may have been missed. Developers can list and claim their applications, add screenshots and reviews etc, and members of oneforty can then rate and review any application they wish.

Laura is also the Principal of Pistachio Consulting, which concentrates on microblogging, and the author of Twitter for Dummies. So she knows her stuff.