FITSh FITS arithmetic from command line, used by HAT et all (now also for TESS)
Apache Guacamole HTML 5 VNC & Remote Display, does not require client, used by VLT for evedroping of telescope operations (enables to grant access at given time to given user, all read(watch) only)
Mauna Kea seems to run a common portal for all mounain operations + organizes internal seminars, can we try something with MMT and Kitt Peak? (have to find common URL)