Gleek

Generates diagrams from text descriptions using keyboard-only input. Create diagrams without touching your mouse. Generate informal, class, sequence, state, gantt, user journey or entity-relationship diagrams using only the keyboard. Gleek supports UML class, sequence, object, ER, flowchart, and mind map diagrams. Gleek offers a free plan with a five-diagram limit and basic features. But familiarity with simple syntax helps, as it’s text-based. Real-time collaboration is supported, especially in premium plans. It integrates with Confluence, Azure DevOps, and Git for premium users. Free users can export as PNG; premium users can export as SVG and more.