This HTTP tunneling tool was developed between about 2005 and 2009 as a side project of mine. It was orginally written in C++ and later also ported to C#. The C++ code is pre C++11, but should still compile with modern compilers. At the time it was written the C# version compiled on both Windows and Linux (using Mono), I have no idea if that is still true.
I'm putting this code up on GitHub for anyone who might find it useful. I am no longer maintaining it, so don't expect any support. If you do find it useful and want to maintain it yourself, feel free to fork it. If you do find any bugs, please feel free to fix them and submit a pull request, I might even find time to review and merge them.