UML Diagrams

PlantUML

PlantUML is an open-source tool that allows users to create UML diagrams from plain text descriptions.

Astah Professional

Astah Professional is a modeling tool that supports UML, ERD, DFD, CRUD and Mind Mapping diagrams. It helps software developers visualize, design, and maintain their software systems.

DIagrams Through Ascii Art

A tool that allows users to create diagrams using ASCII art for various purposes.

C4 model

Diagramly.ai