Confrere - Professional video calling. No downloads. Just a link.

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Messenger Group Video Chats - Makes it simple and seamless to stay connected face-to-face

Bigtent - BigTent is a web-based organization and communication portal for groups.