Tweetbot for Mac
Is there any doubt that Tweetbot will become the Twitter client for Mac? Currently, the app is #2 Top Paid for iPhone, #3 for iPad.
Twitter missed the opportunity to keep its official client (which used to be great) up to date with the latest OS X features. It last received an update in June 2011.
And the sad part is, so many Mac users are still relying on Twitter for Mac only because they are used to it (and because of streaming), but that will change when Tweetbot comes out.