Sketchup
SketchUp is a versatile 3D modeling software popular among architects, interior designers, and hobbyists for its intuitive interface and fast learning curve.
Originally developed by @Last Software and now owned by Trimble, SketchUp allows users to create and modify 3D models with precision using push/pull tools, layers, textures, and measurement guides.
Its clean workspace, real-time rendering, and extensive model library (3D Warehouse) make it ideal for conceptual design, urban planning, and even furniture prototyping.
Though easy to pick up, SketchUp also supports extensions and plug-ins for more advanced modeling and architectural workflows.