Flipgrid offers a free service for educators for creating a topic oriented “grid” that allows for video back and forth video conversations and commentary.
The Extend Toolkit
Tool: Collaborative Content
Tools that allow groups of people to share in the creation or curation of content.
Create, collaborate, and share mind maps with this flexible web-based tool– it’s “frictionless interface helps you focus”
Google Drawings is a free, web-based diagramming software that allows users to collaborate and work together in real time to create flowcharts, organisational charts, website wireframes, mind maps, concept maps, and other types of diagrams.
H5P provides a way to add interactive web elements to almost learning content hosted in WordPress, Moodle, or drupal or any other web site where you can add HTML code.
Use padlet to create a collaborative online virtual board for sharing and connecting ideas and media.