Mechanical Design

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/

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/

Ashlar Inc.
Graphite 2D drafting as well as Cobalt, Xenon, and Argon versions of the Vellum 3D modelling software
http://www.ashlar.com/

Autodesk Inventor
Solid modeling package for 3D mechanical design.
http://www.autodesk.com/inventor

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/

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/

CADables
TurboCAD hatch patterns, color palettes, and related resources.
http://www.turbocadables.com/

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

CoCreate
Provider of engineering collaboration software for product design, management, and development, CAD, PLM, mechanical engineering, and workflow management.
http://www.cocreate.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/

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/

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/

Function Bay, Inc.
Virtual prototyping of complex mechanical systems with the RecurDyn software products.
http://www.functionbay.com/

IronCAD
Solid modeling software for mechanical designers and engineers.
http://www.ironcad.com/

MCS, Inc.
Makers of the Anvil Express software for mechanical design, that also has manufacturing features.
http://www.mcsaz.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

Revware, inc.
Feature-based reverse engineering software for SolidWorks.
http://www.revworks.com/

Romax Technology
Develops software for gear box design, dynamic simulation of gear shift synchronization, and related tasks.
http://www.romaxtech.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/

SeaSolution
CAD/CAM tool for geometric simulation and design focused at ship building and shell plates development.
http://www.seasolution.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/

Sigmetrix LLC
Develops and supports CE/TOL, a tolerance and variation analysis software package for mechanical design and manufacturing processes.
http://www.sigmetrix.com/

SketchCalc
A software that allows to calculate the properties of arbitrary profile sections, imported from DXF.
http://www.sketchcalc.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/

SolidWorks
A solid modeling program for mechanical engineers and designers, as well as add-on applications.
http://www.solidworks.com/

SteelCad
Steel detailing software with packages for structural design, detailing, and manufacturing.
http://www.steelcad.com/

Think3
Produces mechanical CAD software for conceptual design through engineering to manufacturing for products in many industries.
http://www.think3.com/

VariCAD
2D/3D mechanical engineering CAD System for Windows and Linux.
http://www.varicad.com/

Washington Softwares Ltd.
Mechanical design software with 2-D drawing support for designing of centrifugal fans, pressure vessels (ASME and ISI standards), Gears, clutches, and couplings.
http://washingtonsoft.com/

Zetaline Projects Limited
Presents the PipeData-Pro software family for piping designers and engineers [requires JavaScript and Flash].
http://www.pipedata.com/