MCS, Inc. - Makers of the Anvil Express software for mechanical design, that also has manufacturing features.

CoCreate - A software subsidiary of HP that develops mechanical CAD and design management software.

IronCAD - Solid modeling software for mechanical designers and engineers.

MechSoft - Database of standard parts with tools for performing mechanical calculations, for use with many CAD systems.

VariCAD - 2D/3D mechanical engineering CAD System for Windows and Linux.

Structural Dynamics Research Corporation - Develops and markets software development tools for mechanical design and automation, as well as product data management [requires Javascript for navigation].

Minos - A free 3D solid modeling CAD program for Windows.

Ashlar Inc. - Vellum 3D CAD program and Vellum Solids 3D modeling software.

EMT Software - Mechanical plug-ins for AutoCAD and SolidWorks [requires Javascript for Navigation].

SteelCad - Steel detailing software with packages for structural design, detailing, and manufacturing.

Function Bay, Inc. - Virtual prototyping of complex mechanical systems with the RecurDyn software products.

Engineering Software Solutions - Developers of engineering based design software for special requirements in industries such as petrochemical, ship building, mining, civil, mechanical, structual, manufacturing, defence and aerospace.

iccentral.com - Community based site for IronCAD users, with free downloads of models, textures, and tools, a tips and tricks section and a message board.

Think3 - Produces mechanical CAD software for conceptual design through engineering to manufacturing for products in many industries.

Drew's MCAD Connection - A technical resource for users of Autodesk's MCAD products including Mechanical Desktop and Inventor.

Fitsam.com - Independent information portal about the AutoDesk Inventor 3D CAD platform, with a programming reference, examples for the Inventor API, and a news section.

freeCAD - A basic CAD program for creating collections of 3D elements, which can be connected by joints, constraints, actuators, springs, dampers, or forces for running motion simulations.

ProSpur+ - A program designed to create drawings of spur gears, as symbols for ProCAD+ on Acorn RISC computers.

Pilot3D - A relational trimmed NURB curve and surface 3D modeling program, useful for boat hulls and other applications.

Solid ConceptMecaSoft - Develops and sells SolidConcept, a parametric 3D solid modeling software for creating parts, assemblies and automatic 2D drawings.

Sigmetrix LLC - Develops and supports CE/TOL, a tolerance and variation analysis software package for mechanical design and manufacturing processes.

SnapCAD - A mechanical design software package for TEMA type shell and tube heat axchangers and ASME pressure vessels.

Intergraph SmartSketch - A 2D parametric drawing program for Windows, that works on AutoCAD and MicroStation files.

CADables - TurboCAD hatch patterns, color palettes, and related resources.

Saga Software - TabletCAD is a computer program for designing medicinal tablet shapes, calculating tablet volume and surface area and producing tablet technical drawings.

FrigoSim - A tool for the design of thermal energy plants, like refrigerating, AC and heat pump plants.

Manusoft Plastic Pte. Ltd. - Developers of IMOLDWorks, a knowledge-based 3D mold design application for SolidWorks which runs on the Windows platform.

Autopipe - Software that calculates piping code stresses, loads, and deflections under static and dynamic loading conditions, with special features for buried pipeline analysis, wave loading, and fluid transients.

Sheet Lightning - Specialized engineering 2D/3D CAD shareware for sheet metal design and unfolding for fabrication and manufacture. It handles cylinders, cones, square-to-round adapters, ovals, intersections and multi-intersections.