Tableaunoir

Online collaborative blackboard with fridge-magnet elements for teaching and presentations.

Webfree

Tableaunoir is a free online collaborative blackboard built for giving lectures and presentations. Alongside freehand drawing, it offers draggable "fridge magnet" elements that can be arranged to build simple interactive animations, such as walking through a sorting algorithm step by step. It requires no account, supports real-time collaboration, and is aimed at teachers and lecturers who want a more interactive alternative to static slides.

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