The Freedom app for Mac and Windows can block websites, apps, and other distractions to help keep you on task. You can schedule study time in advance or set it up on the fly.
You can use Saent to maximize your productivity by scheduling study periods and censoring distractions. The app can let your friends know that you’re too busy to chat, too. In addition, Saent can let you back onto the internet when break-time finally rolls around.