Coffree
a free tool to stay focused
With Coffree you’ll be free from all the online distractions without having to give up on using your PC. The interface is extremely minimalist, once you open the program you will find a bar where you can write down the URL of websites that distract you during your study/work. Unlike the existing tools, Coffree is completely free and unless you are a geek it’s difficult to deactivate without the complete uninstallation of the program so you don’t fall into temptation.