Elastolix takes any 2 of 6 elastic moduli and calculates the remaining 4. There is a command line tool, named elastolix and a tool with a graphical user interface made with lazarus. Releases for macOS will always be first, others should always follow shortly after.
FireBlade is an OpenGL+Delphi/FPC based crossplatform particle engine. Infinite possibilities through many variable factors and the ability to be connected to anything you want through miscellaneous events.