((new)) Free: Get Sketchup Pro For

: This is the last true "free" desktop version released before SketchUp moved primarily to a web-based model. While Trimble no longer officially supports or hosts it, legitimate installers can sometimes be found via the Internet Archive

The license is valid for 12 months and must be renewed annually. You cannot use it for commercial work.

Blender does not use the "push-pull" method. It is polygon-based, like Maya or 3ds Max. SketchUp users often struggle with Blender’s right-click select and modal editing. However, there are excellent "SketchUp to Blender" workflows and free add-ons (like "Blender for Architecture") that add walls, doors, and windows.