Twitter recently introduced a feature on its website called "Who To Follow". This feature presents you with a list of people you aren't following already, but who are active in your social graph. However, I happen to be very proactive in finding new people to follow through a variety of means, and have no need for Twitter to point it out to me. I thought it was a bit obnoxious to see, especially considering both of my first recommendations were people I had blocked.
This Safari extension removes that box from the Twitter homepage, whether you have it turned on for you or not. It's a simple CSS stylesheet that sets display:none on that box. You'll never have to see it again.
You can download it here. I'm still a bit new at Safari extensions, but it should auto-update in the future if I ever release an update.
Update 9/18/2010: Follow Freely 1.1 has been released, with support for the new Twitter web client. It also fixes the issue where Safari would constantly say there was an update available.
Technology, design, and bacon lover. Software engineer in San Francisco, CA.