Specialy equipment is the Revit category that has "everything else." You will find a wide variety of Revit families here, and most likely, there will be more each time you check back.
We've started this section with Access Door families for floors, walls, ceilings and even ducts - probably every access door you wil ever need.
We've done the same for fire extinguisher cabinets - including both flush-mount and wall-mount families.
From there, we keep adding to our Revit specialty equipment category as engineers, designers and BIM modelers make requests.