Hi HN, Eraser is a whiteboard for engineering teams. It comes with primitives like markdown notes, code blocks, diagram-as-code (for ERDs and sequence diagrams), and architecture icons.

You can use keyboard shortcuts for almost anything. ⌘/Ctrl→, ⌥/Alt→, tab can build you an entire flow chart. You can also use the slash (/) command to quickly insert things. It's real-time multiplayer and you can try without signing up.

Feedback is welcome!