A collaborative workspace for hand-drawn diagrams with collections, instant search, real-time editing, and link sharing. Its MCP tools let AI agents create and edit diagrams alongside a team.
Reladraw is an open-source text-based diagramming tool that uses relative placement to create expressive layouts. Its TypeScript parser and CLI render diagrams to SVG, making diagrams easy to version alongside code.
Archify turns a codebase or system description into polished, interactive architecture maps. It deterministically compiles typed diagram data into self-contained HTML and SVG with validation, themes, motion, and export formats.
Diagram Design is a collection of editorial diagram patterns for Claude Code. It produces self-contained HTML and SVG diagrams for clear technical storytelling.
dbdiagram.io lets you design database schemas by writing a simple DSL (DBML) and instantly see the entity-relationship diagram. It can import from or export to SQL for Postgres, MySQL, and other databases.
Mermaid lets you generate flowcharts, sequence diagrams, Gantt charts, and more from simple Markdown-inspired text syntax. It's widely supported in docs tools, GitHub, and note-taking apps, so diagrams stay easy to version and update.
D2 is a modern diagram scripting language that turns plain text into clean architecture, sequence, and flow diagrams, with a live playground, autoformatter, and SVG/PNG/PDF export.
Free virtual whiteboard for sketching diagrams and wireframes collaboratively with ease.