Some common examples of developer communities include:

Stack Overflow: A popular Q&A website for programmers where developers can ask and answer technical questions.

GitHub: A platform where developers can collaborate and share their code, as well as track and manage their projects.

Meetup: A platform for organizing in-person meetups for developers in a specific location.

Reddit: A website that has a lot of communities dedicated to specific topics, including software development.

Developer forums: Online forums where developers can ask and answer questions, share their experience and knowledge and help others.