Open source web applications for communication.
If your site offers open source code, please indicate (in round brackets) the programming language(s) that the code is known to work on.

This category is for server-side web applications. If your site is about client software, please submit it in the Computers: Open Source: Software: Internet: Clients category.

If your site is about libraries of code, or development frameworks, please submit it to the appropriate Computers: Programming: Languages section.