Tweet Adder is an excellent tool and one of the Twitter desktop clients that you can use to efficiently use Twitter, designed for Automated Twitter Marketing and Promotion.
Update – Tweet Adder is no longer working. Try UpViral for a great tool to run Viral Contests and Giveaways on Facebook and Twitter.
Tweet Adder allows you to find like-minded Twitter followers with similar interest and schedule tweets. The new version Tweet Adder 4 uses Oauth and Twitter API. Tweet Adder is available in a Windows Version, Linux Version and Mac Version.
Tweet Adder 4 Features:
Advanced Twitter Search Capabilities – search by keyword, location, recency, language spoken and more:
Profile Data Search – search twitter bio, plus filters
Location Search – search by geographic location around the world, plus filters
Twitter List Search – imports another users twitter list
Followers of a User – obtains a list of profiles following a particular user
Followed by a User – obtains a list of profiles a user is following
Manage multiple twitter accounts
Following and unfollowing
Automated Tweet Posting and Direct Messaging
Automated Tweet Features
Automated Tweets post throughout the day
Post Tweets to Facebook, and Myspace
RSS Tweets – tweets any RSS feed whether from your blog updates, or any other source
Re-Tweets- Automatically retweet another user