HootSuite is a free Twitter client that will enable you to manage multiple Twitter accounts from the comfort of a single dashboard. HootSuite comes with many useful features that will enhance your tweeting experience. For example, you can organize your Twitter streams into tabs and columns, manage multiple users and accounts, feed RSS, schedule tweets, search topics and monitor tweet statistics. That’s why they call it “the professional Twitter client”!

Features of HootSuite Twitter Client:

• Web-based Twitter client: HootSuite is a web application and requires no installation. All you need is a good web browser.
• Supports multiple Accounts: You will be able to manage all of your Twitter profiles through one client. You can also manage multiple users over various Twitter accounts.
• Customizable user interface with multi-column view : Use HootSuite’s multiple columns feature tabbed layout to organize your Twitter stream into friends, news, search terms, keyword tracking etc. You can drag and drop tabs and create up to 8 columns for each tab.
• Create Groups: Create customizable columns for your friends, groups or topics of interest! Add users through their @username or drag and drop them from other columns!
• Twitter Lists: Import your existing Twitter lists or create new ones and manage them from inside this Twitter client.
• Supports social networks: You can manage multiple Twitter, Facebook, LinkedIn or Ping.fm accounts from a single user interface.
• Ping.fm Integration: Update all of your social networks with a single update! HootSuite with Ping.FM allows you to update your Facebook, WordPress, MySpace, LinkedIn and more.
• Feed Your RSS: Like to feed your blog or website through Twitter? No problem! Now you can automatically feed your RSS to your Twitter stream with HootSuite!
• Schedule Tweets: With HootSuite tweet scheduler, pre-schedule anything you like. This feature will help you in time management, while maintaining a constant Twitter stream.
• Track Statistics. Check how many people click the links you tweet out. Graphs show not only a summary but also individual tweet statistics!
• Embed Columns: Easily embed Twitter search columns in your blog or website!
• Quick Search: Located directly on the dashboard, click the search bar to see current trending topics, to search keywords, or monitor your brand. Like what you see? Save the search as a column!
• Auto Refresh: Keep on top of new tweets, automatically. The auto refresh feature continuously updates your Twitter streams.
• Notifications and Alerts: Know exactly when you get new tweets with our flashing title notification and optional audio alert!
• Clickable Hashtags: Check out what others are saying about a #topic with clickable hashtags.
• View Threaded Conversations: Know what Tweet your followers are replying to with our threaded conversation.
• Collapsable Tweet Panel: View more tweets by hiding the tweet box! You’re still only a click away from expanding the box and firing off a tweet!
• Brand Monitoring: Find out what people are saying about your brand right now.
• View User Info: Easily view users’ details without being taken to a separate window! Click on their username or avatar to view an in-screen popup to view their detailed bio, follow them, or add them to one of your groups.
• Report Spam: Keep spammers off Twitter by clicking their username and the “Report Spammer” link on their bio popup. Whack! Bam! Kapow! Help fight the good fight!

Info and Sign up link:
http://hootsuite.com/