Zoom is a free video conferencing and messaging platform that works across any device.
To get the best functionality, download the app to your computer rather than rely on the browser version.
The first of many intro videos on using Zoom:
Blackboard Collaborate is software used by course instructors at Royal Roads University to facilitate online, synchronous meetings or lectures in online classes. Collaborate sessions can be taped and archived for future viewing.
Instructors can find out more about Blackboard Collaborate by contacting the instructional designers in CTET here.
Although more of a social interaction site, Google Hangouts allows up to 10 users to have group conversations by text, voice or video, and it's free.
Watch the video for a quick walk-through of how Google Hangouts works:
A Join.me free account provides: