My immediate thought was "This looks like GEM" [https://en.wikipedia.org/wiki/GEM_(desktop_environment) https://en.wikipedia.org/wiki/GEM_(desktop_environment)]

My immediate thought was "This looks like GEM" [https://en.wikipedia.org/wiki/GEM_(desktop_environment) https://en.wikipedia.org/wiki/GEM_(desktop_environment)] But your example works too - loved GEOS back in the day ;)