BricsCAD
Octave (formerly Bricsys)
EUR 330–1,176 / year (approx. $385–$1,375)
Dassault Systèmes
$299–$599 USD / year · 2D + 3D · native DWG
The cautionary tale on this page. DraftSight built its audience as the free AutoCAD-alike, then withdrew the free edition and moved to tiers — the "Standard" light version has been replaced outright. What is left is solid, well-supported Dassault software at a fair price. But if you are choosing it because you remember it being free, that reason is gone. Choose it on the merits or not at all.
Annual subscriptions: Professional $299/year, Premium $599/year, Enterprise (network) from $399/year. Perpetual licenses exist but only through resellers and are not publicly priced, so that route is effectively quote only. There is no permanently free edition any more — what remains is a 30-day trial of Premium.
Vendor pricing page: https://www.draftsight.com/how-to-buy
For scale: AutoCAD is subscription only, with no perpetual option at any price since 2016. Autodesk publishes its current rates at autodesk.com.
Pricing and specifications: https://www.draftsight.com/how-to-buy