CadStd Lite is a general purpose, easy to learn CAD or drafting program for creating professional quality mechanical designs, house plans, blueprints, schematics, and charts. It is a freeware blueprint creation application that's customizable, light on system resources, easy-to-use, well-designed and helpful.
Here are some screenshots to illustrate the features and user interface of this application:
Autodesk Design Review
3D Object Converter
LibreCAD
Autodesk 123D Design
Autodesk Fusion 360