Osfoora for Twitter is a powerful Twitter client with a clean and intuitive user interface. You'll enjoy a wide set of powerful features such as Muting users, Read Later, Message Conversations, Multiple Accounts, and more.

Features:

• Multiple accounts with multi-windows.
  
• TweetMarker Support: Timeline syncing of reading position between different Twitter apps.
  
• Inline picture thumbnails for popular services, e.g. Instapaper, Twitter, Yfrog, and more.
  
• Mute users.
  
• Mark Tweets belonging to specific users.
  
• Attach multiple images/videos to tweets.
  
• Image Services: Yfrog, TwitPic, Twitter, CloudApp, Imgly.
  
• Set your own custom Image Upload end point (Must follow the TwitPic API and use JSON).
  
• Video Services: TwitVid, Yfrog, TwitPic, CloudApp.
  
• Read Later (Instapaper & Read It Later) with tweet attribution.
  
• URL Shortening via CloudApp (Default is Twitter).
  
• View/Subscribe to Twitter lists.
  
• Access Twitter lists from user profiles (Lists they created, follow, or followed by)
  
• Direct Messages with conversation view.
  
• Search Twitter and view trends.
  
• Flexible Font sizes (11pt - 20pt).
  
• View users on Favstar, and Twitter websites.
  
• Notifications via Growl and Dock Icon.
  
• Edit your Twitter profile info.
  
• Resizable Sidebar.
  
• Robust Keyboard controls for navigation and popular tasks.
  
• Other features such as Blocking users and Reporting Spam