The htcd server was written around 1997, and served as a dynamic webserver, database and mailing list system at the Physics department at Chalmers University of Technology for roughly ten years. It was originally written for Unix, but was ported to Linux in 2006.
The intention was to make this open source a long, long time ago. Back in 1998, I just did not think open source was a very good idea (!). Anyways, here it is, for purely archeological reasons.