AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
SMath Studio - Tiny, powerful, free mathematical program with WYSIWYG editor and complete units of measurements support.
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting
Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.
AutoCAD Plant 3D - AutoCAD Plant 3D is a BIM software that lets you create, modify, and manage schematic piping and instrumentation diagrams.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming