Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
Sketch - Professional digital design for Mac.
AutoCAD Arch - Design and document more efficiently with the AutoCAD Architecture toolset, created specifically for architects.
Affinity Designer - Professional creative software, exclusively for Mac.
AutoCAD Plant 3D - AutoCAD Plant 3D is a BIM software that lets you create, modify, and manage schematic piping and instrumentation diagrams.