This is a Complete learning offline Tutorial for AutoCAD users in Easy method.
Thingiverse: a thriving community for discovering & sharing 3D printable things.
Emb3D is a high-performance 3D model viewer featuring several rendering options.
AB3DBasic is a design software that transforms 2D shapes into 3D models.
QEPrize 3D Design Studio is a simple and powerful 3D modelling tool.