123D Design

123D Design is a free software from Autodesk that is easy to use and is a powerful tool for creating and the imagination. You can use it on a Mac, PC, iPhone, and iPad.
Screen Shot 2014-11-19 at 12.25.24 PM

Download

PC Requirements:

  • Windows 7 (32-bit or 64-bit)
  • Intel® Pentium® 4 or AMD Athlon® 64 or later with 2 GHz or faster processor; or compatible
  • 2+ GB RAM (1.5 GB minimum)
  • 1.5+ GB free disk space (for installation)
  • Direct3D® 9 or 10 graphics support with 64+ MB

Mac Requirements:

  • Apple® Mac OS® X, version 10.7 or later with 64-bit Intel processor
  • Apple® Mac® Pro 4.1 or later; MacBook® Pro 5.1 or later (MacBook Pro 6.1 or later recommended); iMac® 8.1 or later (iMac 11.1 or later recommended)
  • 3 GB of RAM (4 GB recommended)
  • 2.5 GB free disk space for download and installation (3 GB recommended)
  • 1280×800 display with true color (1600×1200 with true color recommended)
  • All Mac OS X supported operating system languages

tutorials:

Creating Objects

Moving, Snapping, and Cruising

Grouping Objects

Edges, Faces, and Points

123D Design for iPad

Add, Subtract, and Intersect Objects