Directed graph layout engines on .NET / Silverlight / JavaScript / Flash

Who knows good graph layout engines with clear customization and managment?

Flare is an cool one but it is written on Flex (may be you know how it can be customized without re-开发者_开发百科compilation and writing code?). I also know about JavaScript InfoVis Toolkit but it not good enough.

You could try http://graphsharp.codeplex.com/ on Silverlight. Not sure if it works on Silverlight or just regular WPF though.

Don't know how good it is, but Microsoft has MSAGL.

If you are ok with using Flash you could have a look at Open Flash Chart.