Mermaid is a JavaScript-based diagramming and charting tool that uses Markdown-inspired syntax to generate visualizations. It's commonly used for flowcharts, sequence diagrams, Gantt charts, class diagrams, and more. Developers love Mermaid for its simplicity, ease of integration into documentation, and ability to create dynamic, up-to-date diagrams directly from code. This open-source tool is perfect for technical documentation, presentations, and collaborative design. Because these diagrams are text-based, they can be version controlled!