You will get here some links to the ham softwares I'm the author. 
Have a nice visit, and CU soon on the air !

DxNet is a free of charge Dx Cluster serveur program for DOS, Windows and Linux platforms. Source code of both Windows and Linux version are available for download. I can't provide the source code of the DOS version due to the licence rules of the memory manager librairy used on this platform.
You can try DxNet online here : http://dxnet.eu.org
You can also connect to DxNet from a wap terminal : http://dxnet.eu.org/wap

HTTPDxCatcher is a free program designed to get DX spots from the OH2BUA web cluster and pass them to the serial port under either the PacketCluster (tm) format or the CT networking protocol. The K1TTT's nettsr ethernet feature is also supported. That program can be used ie to share the web cluster spottings in a CT/NA/TR/... network.
This is a very basic program, and it is not in my mind to get it to compete with such softwares like DxTelnel. It runs under windows 95/98/NT/2000. Source code (in visual C++ 5.0) is also available for download.
This program is freeware.