SocialOomph is a great free product that does a good job with basic features to manage your twitter presence. It’s free version allows you to delete all your tweets and purge your inbox. This is a good feature to be able to re-brand your Twitter profile. This is especially helpful for those companies that are just starting up and may need to pivot their focus. It allows all of the standard features you would need. Many people feel that the UI is a bit clunky but I didn’t get enough usage to substantiate that claim. You will need to buy a professional license to be able to connect multiple social sites to your account so you can have central management.
All and all a good free tool to get started with