Autodesk no longer sells or supports AutoCAD 2005. Because it is abandonware (unsupported by its creator), the only places offering it for free are:
: Introduced layer filters and grouping, making it much easier to navigate complex drawings. Background Plotting
: Allowed users to continue working on a drawing while a large plot job processed in the background. Tool Palette Updates
This comprehensive article explores the phenomenon behind this search term, the features that made AutoCAD 2005 a legend, the legal and technical pitfalls of downloading it today, and viable alternatives for modern designers.
If you need a free, legal AutoCAD experience, stop chasing the 2005 ghost. Do this instead:
: Autodesk does not allow the reselling or gifting of old licenses between individuals. 2. Technical Compatibility: A 20-Year Gap