LeechBlock LeechBlock is an extension for Firefox and Chrome that allows users to block time-wasting sites. Free Open Source Mac Windows Linux Chrome Firefox Google Chrome extension Customizable Firefox extension Distraction-free UI Add a feature 17 Like
Block Site Extension Block Site is a browser addon to help you block desired websites. To operate, simply right-click on any webpage and click on the "Block this website"... Free Mac Windows Linux Chrome OS Chrome ... Opera Firefox Google Chrome extension Firefox extension Opera extension Add a feature 1 Like
Focus.py Focus.py helps you keep focused by applying schedulable firewall rules to distracting websites. Free Open Source Mac Linux No features added Add a feature 0 Like
SelfRestraint If you find yourself constantly ending up on distracting websites, you know what a time sink your computer can be. Unfortunately, you can't just stop using your... Discontinued The URL to the official website does not work & source at Github has not been updated for an extended period Free Open Source Windows Linux Distraction-free UI Add a feature 22 Like
Idderall An add-on for Mozilla Firefox that can help prevent you from procrastinating by setting up a schedule to block websites. Discontinued Removed by the author. Free Mac Windows Linux Firefox No features added Add a feature 0 Like
Focus Extension Block distracting sites and time-sinks with this Chrome extension so that you can focus and get things done! Has advanced scheduling, multiple blocklists, pre-made... Free Mac Windows Linux Web Chrome OS ... Chrome No features added Add a feature 1 Like
SiteCop SiteCop is a website timer and blocker that protects you from time-wasting websites and includes a Pomodoro option. Free Mac Windows Linux Web Chrome No features added Add a feature 1 Like
Productivity Owl The Productivity Owl is a Google Chrome extension that eliminates your time wasting habits on the internet. Free Mac Windows Linux Chrome OS Chrome Distraction-free UI Add a feature 5 Like
SelfControl -- The Linux port Linux port of the Mac OS X application SelfControl . Uses Perl/Gtk2 + iptables. Provides basic timed blocking of specified hosts. Discontinued The project is no longer updated. Last version, 0.9, released in September 2010, can be still downloaded from the official website. Free Open Source Linux No features added Add a feature 3 Like
