Stay Sharp од Ravi Kumar Gupta

Purpose is to help users block distracting websites and stay focused. Also, when you try to access a blocked website, you will be presented to a page which can be customize to help you kill time.

The custom page can have -
1. Website you can visit for a break - Learning resources, news, etc.
2. Custom Goals to bring you back to focus - like "Read a book", "Go for a walk", etc.
3. and more..

Following features -
- Block specific websites (like Facebook, Twitter, etc.)
- Custom HTML message when visiting blocked sites
- Options page to manage your block list
- Lightweight and privacy-friendly