MCX is a GPU-accelerated, general-purpose, physically-accurate and feature-rich 3-D light transport simulator. It is one of the fastest simulators because it can use tens of thousands of GPU threads to simulate photons in parallel.
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.