This article was published 6 years ago. In year 2019, DraftSight is not available for free anymore except for Beta version for Linux and Mac. Free 30 days trial for the newer version.
DraftSight lets professional CAD users, students and educators create, edit and view DWG files. DraftSight is not just a free 2D CAD product that lets professional CAD users, students and educators create, edit and view DWG files –- it’s much more! DraftSight is a professional-grade product that runs on Microsoft® Windows XP®, Windows Vista®, Windows® 7, Mac® and Linux®.
DraftSight is a professional-grade; open source 2D CAD software for users who want a better way to create, edit and view DWG files. You can start sharing, connecting and interacting with the 3DSwYm DraftSight community members. DraftSight can be used to create 2D drawings, update and maintain .dwg and .dxf files, create PDF files, and exchange files with companies who either provide or require data saved in either .dwg or .dxf file formats.
It’s easy to use and takes just a few minutes to download at DraftSight.com. Plus it includes fee-based, value-added Premium Services for commercial and education users and a free online community that’s loaded with learning resources. Fast, Lightweight both in terms of footprint and system resources. Clean interface, easy to use and understand- especially for those with past CAD experience. Full 2D feature set. Customizable interface and ability to run simple script macros (such as one-button print). Dassault continues to improve the product with each new release.
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Source: 3ds Blog | Online Resources