HelTweetica is the free Twitter app for iPad and the Mac. Read, fave, retweet, @-reply, and direct message tweets. Retweet in both the old style and the new style. Use multiple Twitter accounts.
Retweet in both old and new style.
In-line image previews.
Delete your tweets.
Unread indicators for mentions and direct messages.
Direct Message view.
Conversation thread view.
Analyze timeline for who tweets the most.
Emoji displayed on Mac.
Window positions persist between launches.
Mac OS X 10.6 Intel