BlockIt
BlockIt 0.2.5 for Windows
Sudantha Gunawardena Browser & Email / Browser Tweak
Block web sites you want in Chrome
Google Chrome

Software Summary:

You can run BlockIt on Windows operating systems. BlockIt is a software product developed by Sudantha Gunawardena and it is listed in the Browser & Email category under Browser Tweak. BlockIt is a free software product and it is fully functional for an unlimited time although there may be other versions of this software product.

Alternatives in Browser & Email on Windows