Here is the reply I received today from the owner of the TomCAD site: <paste begins> Hi, First I'd like to excuse may late answer, I have been abroad for some weeks. I worked on TomCAD, but I had no access to my email. Regarding your questions: You are right, the C/C++ source is not available for direct download. But TomCAD itself is a python app, so there is no binary code, just source in the distribution. If you are intersested in building the C/C++ based libs on RedHat 8, I can of course provide the C/C++ source on the website. I will release a new TomCAD version sometime this week, together with a package of my development source tree, so feel free to come back for a visit. Best Regards, Thomas Schmidt