If you’re doing simple stuff, FreeCAD’s sketcher is pretty useful.
FreeCAD has a lot of separate workbenches for different stuff, so I don’t know what OP’s “2D CAD” actually relates to, could be drawing a house or sheet metal. However, it does have a generic “drafting” workbench (that I have never used) that seems more 2D CAD oriented.












If you like PVP, Deadlock has a parry that’s integral to close quarters combat