LeechBlock is described as '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' and is a popular Time Tracking tool in the office & productivity category. There are more than 100 alternatives to LeechBlock for a variety of platforms, including Android, Mac, iPhone, Windows and iPad apps. The best LeechBlock alternative is Mindful : Focus & Screen Time, which is both free and Open Source. Other great apps like LeechBlock are RescueTime, Cold Turkey, DigiPaws and Orkana.