HEATKEYS

GrabCAD - a free CAD model library with 2D / 3D CAD files available for software like SolidWorks, AutoCAD, Autodesk Inventor, Solid Edge, SketchUp etc.

Empowering anyone to create and publish 3D online through our 3D platform of community, 3D content, and free 3D software.

Car Design for Automotive Designers, Engineers and Enthusiasts

CATIA V5 TUTORIALS, Free Tutorial on Freestyle Surface and Solid Modeling techniques for both experts and beginners, Car Modeling tips, Lot of resources for CATIA v5 learners, Discussion Forum, CATIA Job Forum, If you wants to design a car in Catia V...

TracePartsOnline.net is one of the biggest parts libraries in the world, offering 100+ million free 2D drawings & 3D CAD models.

3D models for CAD/CAM/CAE designers. Cars, cities, airplanes and other polygonal and NURBS/SOLID models.

Instructables is the Biggest How To and DIY community where people make and share inspiring, entertaining, and useful projects, recipes, and hacks.

Going beyond traditional 3D CAD Design software, CATIA is the World

YouTube is a place to discover, watch, upload and share videos.

The-Blueprints.com - The largest free blueprint collection on the Internet, more than 40000 blueprints online.

Quora is a continually improving collection of questions and answers created, edited, and organized by everyone who uses it.