https://github.com/knsv/mermaid ᔥ
Now ya’ll know I love me some Markdown, and while this isn’t quite a pretty to read in text format as Markdown is, mermaid scratches a similar itch for me. It provides a way to represent flowcharts and diagrams using text, making it easy to easily store and compare them in your source control repository.
Example
graph LR;
A[Hard edge]-->|Link text|B(Round edge);
B-->C{Decision};
C-->|One|D[Result one];
C-->|Two|E[Result two];
Additional examples here: http://www.sveido.com/mermaid/demo/html/web.html