VariCAD

VariCAD is a 3D/2D CAD system for mechanical engineering. In addition to standard tools for 3D modeling and 2D drafting, the CAD system provides tools for shells, pipelines, sheet metal unbending and crash tests, assembly support, libraries of standard mechanical parts (ANSI, DIN) and symbols, mechanical part calculations and tools for working with bills of materials (BOM) and title blocks. VariCAD supports STEP, STL, IGES, DWG and DXF file formats.

The comprehensive CAD software enables designers to quickly create, evaluate, and modify their models. It is compact, fast, easy to use, and provides everything one needs for mechanical design. The CAD system is sold "fully loaded", including all features and functions, for one affordable price.

Homepage: http://www.varicad.com

Alibre Express 3D

Alibre Design Xpress is a rich and capable 3D solid modeler for creating mechanical parts, assemblies and 2D drawings - and is free. Certain more elegant features, like 3D sketching and part Booleans, can be found in the paid versions of the Alibre Design product family. Alibre Design Xpress equips the person needing basic 3D design capabilities.

Homepage: http://www.alibre.com/products/xpress/

QCad

QCad - это приложение для двумерного черчения посредством компьютера. С помощью QCad можно создавать технические чертежи, такие как планы зданий и интерьеров, чертежи механических деталей и схемы.

Сайт программы: http://www.ribbonsoft.com/ru