"Valentina is a cross-platform patternmaking program which allows designers to create and model patterns of clothing. This software allows pattern creation, using either standard sizing tables or an individual’s set of measurements."
> The Forum https://forum.valentina-project.org/ is a great resource. It's active and admins reply quickly.
but unfortunately the forum seems defunct as well. So, it seems the project is still maintained (last commit a month ago), but none of the affiliated sites are.
[1] https://www.youtube.com/results?search_query=valentina+softw...
[2] http://ankeherrmann.com/valentina-patternmaking-software-fir...