Dassault Systèmes offers a legacy 2D CAD interface that is very similar to AutoCAD 2015. The free tier is watermarked, but excellent for learning.
Before we dive into the download process, it is important to understand why this specific version remains popular today. Autocad 2015 Download Free Trial
: A new darker theme and redesigned interface aimed to reduce eye strain and modernize the workspace. Dynamic Previews Dassault Systèmes offers a legacy 2D CAD interface