ZWCAD 2010 is cost-effective CAD software with DWG file format. Based on IntelliCAD technologies, ZWCAD 2010 assures you of unrivaled compatibility with AutoCAD? efficient drafting features (2D & 3D drawing, editing, dimension, design center, aerial view, etc), and powerful application programming interfaces (LISP, VBA, SDS and ZRX). You can download this CAD software for 30-day free trial! This CAD software includes three versions: Standard, Professional and Academic.