PenEcho adds AI reasoning, Mermaid flowcharts, and multi-model support to Excalidraw-style canvases
abhishek__AI · x · 2026-07-29
PenEcho is presented as an open-source infinite canvas with an AI upgrade for natural sketching, thinking, and diagramming.
- It supports HTML widgets, Mermaid flowcharts, real-time reasoning, and multiple models.
- The screenshot shows a drawing-first interface with an AI assistant for solving math equations, suggesting it is meant for spatial reasoning beyond chat.
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