Online Sangha groups
There is a Theravada group which is run by monastics at Bhavana Society. They run the group through Discord, they do group meditations, sutta readings and book study sessions. You can join their Discord server here

There is also an online meditation group who use google hangouts. They usually do meditations twice every weekday. They aren't affiliated with any Buddhist tradition although there is a monastic who hosts meditations regularly. This is their google plus page