Activision
Yes, both SelfCAD and Plask Motion offer a Free Trial.
SelfCAD is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Plask Motion is designed for and undefined.
Pricing for SelfCAD Starts at $11.99/Month when Billed Yearly whereas for Plask Motion Starts at $50.00per month when Billed Yearly.
Some top alternatives to SelfCAD includes 3D Slash, Clara.io, SketchUp, 3ds Max, ZBrush, formZ, Onshape, BricsCAD and Autodesk Design Review.
Some top alternatives to Plask Motion includes and undefined.