Twitterrific 4 for Mac was just released, and it’s great. I’ve always been a big fan of Twitterrific, and especially the desktop version. It hadn’t been updated in quite some time though, and had really started to show its age – lacking support for even the simplest of functions, such as standard retweets.
Twitterrific 4 is free to download (from the website) and use with one account, and it’s also available for purchase on the Mac App Store for $9.99. The paid version removes ads and supports multiple accounts.