ASCIIFlow Infinity : Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.
Azimutt : Azimutt is an Entity Relationship Diagram (ERD) targeting real world database schema (big & messy).
Excalidraw : Virtual whiteboard for sketching hand-drawn like diagrams.
Collaborative and end-to-end encrypted.
Diagrams : Diagrams lets you draw the cloud system architecture in Python code.
It was born for prototyping a new system architecture without any design tools. Y...
PlantUML : PlantUML is an open-source tool allowing users to create UML diagrams from a plain text language
Terrastruct is a tool to create diagrams that excel at visually explaining complex systems, such as your organization's engineering architecture.