Autodesk Navisworks is a 3D design review package primarily used in construction industries to complement 3D design packages (such as Autodesk Revit, AutoCAD, and MicroStation). Navisworks allows users to open and combine 3D models; navigate around them in real-time; and review the model using a set of tools including comments, redlining, viewpoint, and measurements.
Revit MEP is a building information modeling (BIM) software created by Autodesk for professionals who work in MEP engineering. It provides mechanical, electrical and plumbing (MEP) engineers with tools to design complex building systems.