CSDN is a professional developer community platform providing original content, technical forums, and resources for IT professionals.

daily.dev is an open-source professional network and personalized news feed for developers to learn, collaborate, and stay up to date with tech knowledge.

Showwcase is a professional network and platform for developers to connect, share knowledge, showcase work, and find curated career opportunities globally.

DevsForDevs is a developer community platform for sharing knowledge and is used by developers.