AutoCAD Civil 3D

AutoCAD® Civil 3D® software is a Building Information Modeling (BIM) solution for civil engineering design and documentation. Civil 3D is built for civil engineers, drafters, designers, and technicians working on transportation, land development, and water projects. Stay coordinated and explore design options, analyze project performance, and deliver more consistent, higher-quality documentation—all within a familiar AutoCAD® software environment. 

Homepage :

http://usa.autodesk.com/civil-3d/

Download :

 http://usa.autodesk.com/civil-3d/trial/

ASCAD

software for civil engineers and land-surveyors that automates the implementation production rules for laying out civil engineering drawings. From CADCOM.

Homepage :

http://www.cadcom.ca/ascad/index.htm#description

Download :

http://www.cadcom.ca/download/index.htm