Web Whiteboard by Miro

Spacedeck is a self-hosted real-time collaborative whiteboard application with rich media support. Use Spacedeck for mood boards, collages, as a collaborative digital whiteboard, or design thinking.

WBO is an open-source online collaborative whiteboard that allows many users to draw simultaneously on a large virtual board.

Excalidraw is a virtual collaborative whiteboard tool that lets you easily sketch diagrams with a hand-drawn feel.

OpenBoard is an open-source, cross-platform teaching software for interactive whiteboards designed primarily for use in schools and universities.

InVision is an online whiteboard and productivity platform that gives you clarity, collaboration, and control of everything you need to power your design process.

Stormboard is a collaborative whiteboard app that helps teams capture and organize ideas, prioritize tasks, plan projects, and manage meetings.