First a huge disclaimer - Jonathan Osuch has a very demanding job and can only work on fractint a few hours a week, if that. So he can't respond to feedback in a timely way. This is not to say he doesn't want feedback. That said, Jonathan has been working on an SDL (https://www.libsdl.org/) port of fractint that runs natively on Windows, including Windows 10. This effort is hiding in plain site on the website here: http://fractint.net/ftp/experimental/ Just download the SDL*.zip file, dump the contents somewhere, navigate to the fractint.exe file, and run it. The SDL port can potentially be compiled on other platforms, e.g. Ubuntu Linux, but Jonathan doesn't have that working yet. A couple of points. This is a literal port of the classical DOS fractint, not a normal windows application. So the interface looks a lot like the DOS fractint, and is probably hard to use if you are not familiar with the classic version. This is not even a winfract port, which has some windows interface features. This is alpha quality. An amazing amount works but some things (probably a lot of things) don't. It would be interesting for some of you DOS fractint experts to give this a try. If it seems promising, you might consider some systematic testing (might be premature). Since the list is quiet these days, I see no harm in discussing the results here. Probably you folks can help each other out, since Jonathan will only occasionally be able to chime in. Tim