Samsung Flip - A 55" digital white board from Samsung
Jamboard - Interactive Business Whiteboard | G Suite
Witeboard - A real-time whiteboard for your team. No signups required.
AutoDraw - A Google Experiment that helps you draw with relevant suggestions.
Sketchboard.io - Visual Remote Teamwork. Solve problems and create ideas on endless whiteboard with your teammates by sketching.
Explain Everything Online Whiteboard - Interactive online whiteboard with voice chat and recording