This is my central e-learning platform – Moodle. Pupils sign in here and use it as a main landing page. SSO to Mahara connects these two very closely. Big Blue Button can be used for distance learning but is rather used for recordings in flipped classroom scenarios (ongoing project) as well as for desktop sharing in laptop classes.
Many plugins are used to customise Moodle, especially a connection to Mahara and OneNote. A connection to edu-sharing is being evaluated.