dot

TOOLS

Gravizo allows you to embed DOT (and others) using image declarations.

Markdown:

![Alt text](http://g.gravizo.com/g?
  digraph G {}
)

HTML:

<img src='http://g.gravizo.com/g?
 digraph G {}
'/>

DOT. Wikipedia.
Drawing graphs with dot. PDF. Emden Gansner, Eleftherios Koutsofios, Stephen North.
GraphViz for discrete math students.