The Code Vault is a framework of C++ classes that provide a solid foundation for writing programs that run on Unix, Windows, and Mac OS X with nothing more than a recompile. This foundation consists of all the non-UI sort of stuff that you need to work cross-platform: data types, thread-related objects, simple containers, stream-based i/o on files and sockets, client and server sockets. And the vault provides all of this with an elegant and simple to use set of C++ classes.

What the vault does not attempt to do is provide you with a cross-platform UI. Others have spent massive amounts of time trying to solve that problem. The vault does the plumbing, which you can build on with significant work for UI, and build on very easily for cross-platform faceless network server software.

Check it out. The online documentation has complete Doxygen-generated class API specs.