Superstar
If you're an Internet addict who needs help curbing your addiction, then you need to check out SelfControl from Steve Lambert. SelfControl is a Mac-only program that blocks out the entire Internet -- or blacklisted sites of your choosing -- for a preset amount of time.

The length of Internet blockage is set by the user, and once set, cannot be undone. Restarting your computer, using a different browser and even uninstalling the program won't turn the Internet back on. If you're a true Internet addict who needs help kicking the habit, then you need to install SelfControl from Steve Lambert.