Sketchpad: Draw, Create, Share!
Create digital artwork to share online and export to popular image formats JPEG, PNG, SVG, and PDF.
Notability: Create and Annotate Notes
Free and paid versions.
Microsoft Whiteboard: Digital Online Whiteboard App
The intelligent canvas for creative collaboration and teamwork that’s included with Microsoft 365.
Explain Everything: Interactive Whiteboard for Teaching and Learning
Record tutorials and create interactive presentations and assignments.
Conceptboard: Collaborative Online Whiteboard
Conceptboard's Collaborative Online Whiteboard gets teams on the same page. Free and paid versions.