Concentrate Alternatives

LeechBlock is a simple free productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.

The All-In-One Application and Website Blocker for Windows, Mac and Android.

SelfControl is a free and open-source application for Mac OS X that lets you block your own access to distracting websites, your mail servers, or anything else on the Internet. Just set a period of time to block for, add sites to your blacklist, and click "Start.

StayFocusd is a productivity extension for Google Chrome that helps you stay focused on work by restricting the amount of time you can spend on time-wasting websites. Once your allotted time has been used up, the sites you have blocked will be inaccessible for the rest of the...

Vitamin-R is a different kind of productivity tool. It helps you getting started, supports you in your task, keeps you focused and motivated.

Freedom is an application that disables networking on an Apple computer for up to eight hours at a time. Freedom will free you from the distractions of the internet, allowing you time to code, write, or create.

Focus is a Mac app that blocks distracting websites (like Facebook and Reddit) and applications, so you can improve your productivity.

Too many windows to manage? Big display? Or getting lost in multiple monitors? HazeOver is for you! ? TRIAL version: HazeOver.com

The Productivity Owl is a Google Chrome extension that eliminates your time wasting habits on the internet.

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 computer because you need it to be able to get work done.