It works well with Autocad 2000 version files.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
DeltaCAD - Powerful, easy to learn 2D CAD (Computer Aided Design) program designed to meet all of your CAD...
FreeCAD - An open-source parametric 3D modeler
SketchUp - 3D for Everyone
Autodesk AutoCAD - Autodesk AutoCAD is a commercial computer-aided design (CAD) and drafting software application.
QCAD - QCAD is an application for computer aided drafting in 2D.