The ESA SNAP Toolbox surpassed 300000 downloads on December 19th 2018. SNAP stands for “SeNtinels Application Platform” and it is the fully free and open-source toolbox platform that supports processing of raster imagery from ESA, Copernicus Sentinel 1/2/3, and many 3rd party satellite missions. SNAP is available at:
http://step.esa.int/main/download/
and the SNAP discussion forums can be found at:
ESA SNAP Toolbox surpasses 300000 downloads
Start the discussion at forum.step.esa.int