GunFire - the GPL chip programmer software
Resources used for developing this project
The wxWidgets toolkit is invaluable for cross-platform support.
General PC interfacing resources
The PortIO library is being used to provide access to the PC ports.
The BeyondLogic site covers details of how to use all PC port hardware.
Jan Axelson's site also covers detail of using ports, including useful programming information.
SourceForge is definitely the best plan for hosting open-source projects.