Description: BookStack is an open source knowledge management platform to help build and organize wikis for internal or public use. It allows you to collaboratively write and structure documents to organize knowledge, notes or documentation.
Type: software
Pricing: Free
Description: Chess.com is a popular website and app for playing chess online. With over 30 million members, it allows you to play chess games through your web browser or mobile device against opponents of varying skill levels.
Type: software