This graph can be rendered by WebDot using the NEATO layout engine, in any of the following formats:
dot (text/vnd.graphviz) epsi (application/postscript) fig (application/x-fig)
gif (image/gif) gv (text/vnd.graphviz) hpgl (application/x-hpgl)
jpeg (image/jpeg) mif (application/x-mif) pcl (application/x-pcl)
pdf (application/pdf) pic (application/x-pic) png (image/png)
ps (application/postscript) ps2 (application/postscript) svg (image/svg+xml)
svgz (image/svg+xml) tcl (application/x-tcl) vrml (x-world/x-vrml)
vtx (application/x-vtx) map (text/plain) ismap (text/plain)
imap (text/plain) cmap (text/plain) src (text/plain)
It can also be formatted by the: DOT, TWOPI, FDP, SFDP, CIRCO, layout engines.
Sources for WebDot can be found at: http://www.graphviz.org/pub/graphviz/
WebDot is by: John Ellson (ellson@graphviz.org)