Here are several screenshots of the current version 2 of reZonator with short descriptions of what you can see on them. Screenshots for the previous version 1 are here. Click on the picture to open it in the full size.

Project window and Element Properties dialog

Project window and Elements Catalog window

Stability Map function with its mode selector

Caustic function with its data table and Intermode Beats Frequency function

Multirange Caustic function

Multibeam Caustic function and Pumps window

2D Stability Map function and Round-trip Matrix function

Beamsize Variation function and Adjustment window

Linking element parameter to a global parameter

Gaussian Beam Calculator Tool