Hacker News is a social news website focusing on computer science and entrepreneurship. It is run by Paul Graham's investment fund and startup incubator, Y Combinator. In general, content that can be submitted is defined as "anything that gratifies one's intellectual curiosity.

Code Project is a community for computer programmers with articles on different topics and programming languages such as web development, software development, C++, Java, and other topics.

Founded in 2008, Stack Overflow’s public platform is used by nearly everyone who codes to learn, share their knowledge, collaborate, and build their careers. Our products and tools help developers and technologists in life and at work. These products include Stack Overflow for Teams, Stack Overflow Advertising, and Stack Overflow for Talent and Jobs. Stack Overflow for Teams, our core SaaS collaboration product, is helping thousands of companies around the world as the transition to remote work, address business continuity challenges, and undergo digital transformation. Whether it’s on Stack Overflow or within Stack Overflow for Teams, community is at the center of all that we do.

Django Girls is a non-profit organization and a community that empowers and helps women to organize free, one-day programming workshops by providing tools, resources and support. We are a volunteer run organization with hundreds of people contributing to bring more amazing women into the world of technology. We are making technology more approachable by creating resources designed with empathy.

The freenode project exists to help peer-directed project communities flourish. Peer-directed projects combine open, informal participation with broad licensing and wide dissemination of output. freenode provides facilities to peer-directed project communities, including those of free and open source software (FOSS). The IRC component of freenode is a self-referential medium, existing mainly to service IRC users — but the network was created to serve groups that exist outside of IRC. freenode is designed to encourage community members to improve their skills in the areas of cooperative effort, interpersonal communication and project coordination, and to create a real-time bridge to the outside world for our target communities.