- Alibre, Inc.
 - Offers an Internet-enabled mechanical CAD application for creating 3D models and associative 2D drawings; users can also import product designs from other MCAD applications. - Coade, Inc.
- Develops mechanical engineering software addressing piping and pressure vessels for the power, petrochemical, and related industries.
- Codeware
- Sells software for ASME pressure vessel and heat exchanger design, rating, cost estimating and drafting.
- D-Soft LLC
- Markets software packages for calculating hydraulics and pressure vessel statistics and data.
- Engineering Software Research and Development (ESRD)
- Offering advanced p-version finite element analysis code that incorporates full modelling capabilities with handbook convenience.
- Geomate Corporation
- Makers of geometric spreadsheet software for solving engineering design problems and mechanical engineering designs which involve geometrical constraints.
- Harvard Thermal, Inc.
- Developers of the Thermal Analysis System (TAS), a thermal modelling software package. Also offers thermal and engineering consulting services.
- Jordan, Apostal, Ritter Associates, Inc
- Full service provider of CAD/CAM/CAE hardware and software products integrated with engineering problem solving and design support services.
- Mechtol
- New River Kinematics
- Engineering software development firm specialising in spatial transformations and computer graphics.
- OnLine Dynamics, Inc.
- Symbolic manipulator for statics, dynamics, and mathematical analysis. Performs operations involving scalars, matrices, and vectors.
- SolidTools
- Design tools to leverage mechanical engineering information.
- Taftan Data
- Developer of engineering applications.
- Vibrant Technology
- Developer of the ME'scope, a Windows programme for noise and vibration analysis. Features include modal and MIMO analysis, and structural modifications.
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