DraftSight is described as 'Professional-grade 2D CAD tool for creating, editing, and sharing DWG files with 3D support, cross-platform compatibility, annotation, and layer features' and is a popular CAD software in the photos & graphics category. There are more than 50 alternatives to DraftSight for a variety of platforms, including Windows, Mac, Linux, Web-based and iPad apps. The best DraftSight alternative is FreeCAD, which is both free and Open Source. Other great apps like DraftSight are LibreCAD, Autodesk AutoCAD, SOLIDWORKS and Onshape.
QCAD is an application for computer aided drafting in 2D. With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schemas and diagrams.
Feature-rich 2D and 3D CAD application supporting native DWG files, offering multiple-document interface, advanced drafting tools, full AutoLISP and ADS compatibility, IntelliCAD Explorer for managing layers and settings, seamless Windows integration, and support for legacy drawing formats.
The professional furnishing 2D-/3D-tool for everybody: The pCon.planner is a cost-free application allowing you to comfortably and professionally create complex furnishing concepts and to visualize them in a photo-realistic quality. File Formats: dwg, dxf, 3ds, skp, ... Language.
CAD Sketcher is a free and open-source project looking to enhance precision workflows in Blender by bringing CAD like tools, features and usability to Blender.
Vectorworks is a computer-aided design (CAD) software program developed by Nemetschek North America that is used for drafting, technical drawing and 3D modeling. Vectorworks offers 2D, 3D, production management, and presentation capabilities for all phases of the design process.
progeCAD Smart 2009 is a limited version of progeCAD . It is free for private, non-commercial use only.
All the productive tools and smart features for 2D drafting and design that you expect at a reasonable price. With DWG 2010 as its primary drawing file format and DXF support.
MegaCAD 3D is the ideal synthesis of an innovative solid and surface modeling system and a full-feature 2D drafting program. If you are developing your model in 3D or if you are drawing a 2D design, each step will automatically be transferred from one dimension into the other...
Bentley Architecture is an advanced, yet intuitive and easy-to-use architectural building information modeling (BIM) application that empowers architects and designers to create with unlimited freedom.
KOMPAS-3D is for creating three-dimensional associative models for individual parts and assembly's containing both original and standardized elements. The parametric technology allows quickly obtaining models for typical products basing on a once designed prototype.
Best selling AutoCAD replacement for the Apple Mac OS X - DWG/DXF 2D/3D - the AutoCAD alternative that costs about a fraction of AutoCAD. PDF 3D free export
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QCAD is a very basic drawing program without support for blocks and XRefs, which will be sufficient for some people but it is not an alternative to AutoCAD-like drawing programs.
On the plus side it is very cheap!