CADables - TurboCAD hatch patterns, color palettes, and related resources. - http://www.turbocadables.com/
Enventive Engineering, Inc. - Software for the combination of preliminary design, mechanism motion simulation, travel and effort studies, critical parameter identification and analysis, optimization, and tolerance analysis. - http://www.enventive.com/
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. - http://www.revcad.com/sheet5/
Ascon Group - Develops software for 3D Parametric Solid Modelling and 2D Drafting, with add-ons for motion simulation, photorendering, kinematic and dynamic analysis. - http://www.ascon.ru/english/
Cadsoft Solutions, Inc. - Developer of Concepts Unlimited, 2D 3D modeling tools for Mac and PC designers. Supports precise NURBS,analytices, rendering, animiation and drawing composition. - http://www.csi-concepts.com
Washington Softwares Ltd. - Mechanical design software with 2-D drawing support for designing of centrifugal fans, pressure vessles (ASME & ISI standards), Gears, clutches, and couplings. - http://washingtonsoft.com/
Alibre Inc - Alibre Design is a low-cost parametric mechanical design application with CAD-neutral data sharing and online collaboration tools. - http://www.alibre.com/
Revware, inc. - Feature-based reverse engineering software for SolidWorks. - http://www.revworks.com/
SeaSolution - CAD/CAM tool for geometric simulation and design focused at ship building and shell plates development. - http://www.seasolution.com/
SketchCalc - A software that allows to calculate the properties of arbitrary profile sections, imported from DXF. - http://www.sketchcalc.com/
Autodesk Inventor Tutorials by Sean Dotson - Basic and advanced tutorials on the use and customization of Autodesk Inventor 3D CAD software, discussion forums and current CAD news. - http://www.sdotson.com/
Autodesk Inventor - Solid modeling package for 3D mechanical design. - http://www.autodesk.com/inventor
Romax Technology - Develops software for gear box design, dynamic simulation of gear shift synchronization, and related tasks. - http://www.romaxtech.com/
Zetaline Projects Limited - Presents the PipeData-Pro software family for piping designers and engineers [requires JavaScript and Flash]. - http://www.pipedata.com/
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. - http://www.autopipe.com/
Saga Software - TabletCAD is a computer program for designing medicinal tablet shapes, calculating tablet volume and surface area and producing tablet technical drawings. - http://simnet.is/sagasoftware/
Intergraph SmartSketch - A 2D parametric drawing program for Windows, that works on AutoCAD and MicroStation files. - http://www.intergraph.com/imagine/
SnapCAD - A mechanical design software package for TEMA type shell and tube heat axchangers and ASME pressure vessels. - http://www.snapcad.com/
Sigmetrix LLC - Develops and supports CE/TOL, a tolerance and variation analysis software package for mechanical design and manufacturing processes. - http://www.sigmetrix.com/
Solid ConceptMecaSoft - Develops and sells SolidConcept, a parametric 3D solid modeling software for creating parts, assemblies and automatic 2D drawings. - http://www.solid-concept.com/
Pilot3D - A relational trimmed NURB curve and surface 3D modeling program, useful for boat hulls and other applications. - http://www.pilot3d.com/
ProSpur+ - A program designed to create drawings of spur gears, as symbols for ProCAD+ on Acorn RISC computers. - http://www.dsnell.zynet.co.uk/PS/ProSpur.html
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. - http://www.askoh.com/
Think3 - Produces mechanical CAD software for conceptual design through engineering to manufacturing for products in many industries. - http://www.think3.com/
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. - http://www.ess.com.au/
Function Bay, Inc. - Virtual prototyping of complex mechanical systems with the RecurDyn software products. - http://www.functionbay.com/
SteelCad - Steel detailing software with packages for structural design, detailing, and manufacturing. - http://www.steelcad.com/
Ashlar Inc. - Graphite 2D drafting as well as Cobalt, Xenon, and Argon versions of the Vellum 3D modelling software - http://www.ashlar.com/
VariCAD - 2D/3D mechanical engineering CAD System for Windows and Linux. - http://www.varicad.com/
IronCAD - Solid modeling software for mechanical designers and engineers. - http://www.ironcad.com/
CoCreate - Provider of engineering collaboration software for product design, management, and development, CAD, PLM, mechanical engineering, and workflow management. - http://www.cocreate.com/
MCS, Inc. - Makers of the Anvil Express software for mechanical design, that also has manufacturing features. - http://www.mcsaz.com/
SolidWorks - A solid modeling program for mechanical engineers and designers, as well as add-on applications. - http://www.solidworks.com/