Here's a showcase of what I've been working on lately:
One oft requested feature that this workbench lacks is non-metric fasteners. (https://imgur.com/HZFjXGq
1/4in and #12 screws, fully functional and parametric in my github fork
Currently the new fastener types are added as additional buttons in the command set. I recolored existing icons to a maroon red to indicate the different measurement system.
I also updated the code to store most of the fastener data in .csv files. This way I can edit/make new data tables using Libreoffice. (Previously, data was stored as hardcoded python dictionaries - awkward to work with!)
There is still lots to do. I want to get many of the most common fastener types working in Inch mode, as well as add some completely new features that take advantage of the more flexible sizing system. If you would like to check up on my work, see my github fork: https://github.com/slowinternets/FreeCAD_FastenersWB