Clusterfck is a nice JS library for hierarchical clustering: http://harthur.github.com/clusterfck/ http://harthur.github.com/clusterfck/ I put together a tiny

Clusterfck is a nice JS library for hierarchical clustering: http://harthur.github.com/clusterfck/ http://harthur.github.com/clusterfck/ I put together a tiny tool like the posted link for playing with clusterfck: http://dylanfm.github.com/Ladderfck/ http://dylanfm.github.com/Ladderfck/ Kind of handy for getting a feel for what you can do - e.g. trying different distance metrics and linkages. It too uses canvas.