Web2.0 open-source program

Nowadays, Web 2.0 is developing rapidly on the Internet (the Web 2.0 mentioned here does not include blogs or wikis). However, due to profit considerations, many have opted for commercial operations and commercial releases, with very few open-source Web 2.0 projects available, and even fewer in China (where people are busy imitating and focusing on commercial operations). Additionally, these open-source projects are all based on the PHP platform, while only a few in China have developed some ASP platform-based projects. Here, I will introduce a few of them. If you know of any others that haven't been listed here, please feel free to add them.