What are free tools for learn topology 3D models?

Free tools for learning 3D model topology include open-source Blender, the free version of 3D Coat, and Topogun’s limited trial—all great for practicing edge flow and mesh optimization. Blender has built-in retopology brushes and mirroring to master clean mesh structure; 3D Coat’s free tier offers modules for refining high-poly/scanned models; Topogun’s trial lets you test manual retopology workflows. If you’re new, start with Blender’s free YouTube tutorials—they guide you through basic edge flow exercises without extra costs or complex setup.