Downloading Self Control 1.4 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X was originally developed by Steve Lambert, Charlie Stigler. The most popular version among the application users is 1.3. The application is categorized as Security Tools.
From the developer:
SelfControl is an OS X application which blocks access to incoming and/or outgoing mail servers and websites for a predetermined period of time. For example, you could block access to your email, facebook, and twitter for 90 minutes, but still have access to the rest of the web.
You may want to check out more Mac applications, such as Draft Control, Music Control for iTunes, Spotify, Rdio and Personalized Internet Radio or Pest Control Software for MAC, which might be related to Self Control.