Open the Mac App Store to buy and download apps.
Twit Menulet is a combined Twitter and Tumblr client that fits in the Mac menu bar--allowing you to constantly monitor the tweet stream without opening a web browser or other stand-alone application.
Tweets are displayed as a scrolling "ticker" in your menu bar. Tumblr photos are displayed inline, so Twit Menulet is perfect for following photo-heavy tumblogs.
Click the menu to see the whole tweet stream, to visit links, or to post your own tweets. Twit Menulet organizes tweets into threaded conversations, allows multiple accounts, supports native retweets, and provides global hotkeys for fast access to functionality.
Does what it says it will do... One complaint .. when I have it set to scrolling updates, it continues to repeat and repeat the latest tweet. Why not have it repeat once and then stop and only scroll the new tweets that come in?