Wiki.js is a Javascript-based wiki you can run on your computer or (better) in the cloud. It is open source and based on Node. It uses any of a number of database engines and runs on most platforms. There are modules available that allow you to run analytics, use social authentication, and choose the content editor you wish to use, and sync and backup your content to a number of storage services.
I really think RoamResearch has some unique features and pulls it all together in a new way. Maybe that bidirectional links (subject of this video) are not unique, but the way they use unlinked references and play with the sidebar is pretty amazin.
Jon Bell worked on Twitter's Abuse team as the lead designer in 2016, and is haunted by his team's inability to take the threat seriously and make significant progress towards addressing it.
Zoom is teaming up with Facebook Inc. to make Zoom Whiteboard available in the social network's Oculus virtual reality headsets. Users will gain the ability to collaborate on documents and other files in a virtual room through Oculus Horizons Workrooms, a VR collaboration app available with Oculus headsets.