1)   MITCalc - Shaft connection 1.13
Geometric designs and strength checks of shaped connections of shafts with hubs (keys, splines). Application supports Imperial and Metric units, is based on ANSI, ISO, DIN BS, JIS standards and support many 2D CAD systems
Shaft, hub, connection, shaped connection, keys, splines, design, strength check, ANSI B17.1, ANSI B17.2,

 2)   MBSS Starfields 2.1
MBSS Starfields offers the ability to define starfields, nebulas, northern lights, comets, plasma clouds, neon spark ribbons and more.
Stars, Nebula, Northern Lights, Splines, Gravity, Sparks, Light, 3D animation, particles, space,