D2 is a modern diagram scripting language that turns text to diagrams
The sassy UML diagram renderer
an Open Source BPMN 2.0 / DMN 1.1 Modeler
An editor for the specification of Graphol ontologies
Generate railroad diagrams from code or BNF. Generate BNF from code
An editor for the specification of Graphol ontologies
The open source embeddable online markdown editor (component)