Realsoft 3D 

Feature wise, Realsoft 3D introduces features like SDS modelling, ray tracing, advanced physics simulation, open design. The program is used for example by artists working in the advertising industry, architects, product designers, game industry.
3d realsoft 3d modelling animation rendering photo realistic b-spline subdivision booleans particle collision skeleton behavioral

Newton's Aquarium 

Newton's Aquarium is an interactive physics package that helps students visualize and understand Newton's Law of Universal Gravitation. While creating and exploring their own solar systems, students encounter the core concepts in classical physics.
acceleration force gravity mass moon newton orbit physics planet speed star velocity weight