FreeCAD Assembly Workbench
(Redirected from Assembly Workbench)
The one to use is Asseembly2 workbench:
Three maintained versions of the Assembly Workbench exist: A2plus, Assembly3 and Assembly4. Which one is used by OSE? Which one should be used?
A2plus  Last release 26 Apr 2020 Assembly3  Last release Apr 24 2020 Assembly4  Last release Apr 17 2020
Probable USPs: Solution to topological naming problem. User base, Developer base.
Additional Info from the FreeCAD forum:  
Clone the Assembly 2 github repo directly into your '.FreeCAD/Mod/' directory (which also allows easy updates with `git pull` in the future) as follows:
mkdir $HOME/.FreeCAD/Mod cd $HOME/.FreeCAD/Mod git clone https://github.com/hamish2014/FreeCAD_assembly2.git
You will now have access to the 'Assembly 2' workbench the next time you close & restart FreeCAD.