Mermaid: Generate Diagrams and Flowcharts with Markdown Like Syntax
draw.io [1] has this hidden under Arrange->Insert->From Text and is also open source [2]. I work on the project.<p>[1] <a href="https://www.draw.io" rel="nofollow">https://www.draw.io</a><p>[2] <a href="https://github.com/jgraph/draw.io" rel="nofollow">https://github.com/jgraph/draw.io</a>