Computer-Aided Design Tools

SketchUp
http://www.sketchup.com/
SketchUp is 3D modeling software that's easy to learn and incredibly fun to use.
Download SketchUp today for free and get started drawing in 3D. Excellent for woodworking, architecture, and numerous other applications.

Tutorials:

•  SketchUp for Woodworkers

            https://www.youtube.com/playlist?list=PLKZBbhGUj_17_vZspQ-jG4gwxjxaOmLK5

•   SketchUp Basics( 4 videos)

            http://www.techedlearning.com/sketchup-101-sc.html

SketchUp(Browser Version)

• Getting Started with my.sketchup.com
• Creating and editing models

Other 3D-Modeling Software:

 TinkerCAD( Browser-based)
 https://www.tinkercad.com/

• Introduction
• Basic Skills
• In-Depth Tutorial

Advanced 3D Modeling Software:

 AutoDesk Fusion 360( PC/Mac)
 http://www.autodesk.com/products/fusion-360/students-teachers-educators

   Tutorials:

• Fusion_training_attendee_print_guide.pdf
• Autodesk Tutorials

  OnShape( Browser-based)
  https://www.onshape.com/
    Tutorials: https://www.onshape.com/learn/learn-cad#

 Solidworks( PC)
 http://www.solidworks.com/sw/education/mechanical-engineering-student-software.htm

             Solidworks Tutorials
             http://www.solidworks.com/sw/resources/solidworks-tutorials.htm

              MIT 2.00B Solidworks Introduction