ShapeWorks is an innovative and extremely beginner friendly program for effortless 3D digital sculpting. Its fluid interface enables artists to quickly give shape to there imagination. No need to go through several hoops, hassles to remember several key shortcuts and tire yourself in complex pipeline for designing your 3d model.
Additionally I use it for Automatic Model Optimizer software to reduce file size & polygon numbers. Additionally, converts triangles to quads for automatic retopology generation.