http://rise4fun.com/ is a web front end to a number of tools produced by the RiSE group. It also exposes REST services that allow you to play with the tools from your favorite environment.
Rendering DOT graphs to SVG
DOT is a popular language to describe graphs. It can be rendered into SVG using the MSAGL tool on http://rise4fun.com . To do so, you simply need to do a POST query to http://rise4fun.com/services.svc/ask/agl where the dot code is passed in the request body. rise4fun returns SVG markup that can be viewed in browsers that support it.
Wondering what graph SVG look like? Check out http://rise4fun.com/agl/cilreader to see this beautiful graph. Make sure to zoom out as the graph is rather laaaaaarge.