Cluster Visualization

iPlots is a package for R statistical environment (see www.r-project.org) which provides high interaction statistical graphics, written in Java.
-> http://www.rosuda.org/iPlots/index.shtml

iPlots is packaged together with JGR, a Java-based GUI for R.
-> http://stats.math.uni-augsburg.de/JGR/

iPlots provides interactive scatter-, histo- and barplots. Interactivity basically means reformatting the graph (rescaling, rotating,..) and selecting certain data points.

iWidget is also part of JGR and allows the addition of interactive sliders, buttons, etc. to a plot!

w <- iwindow()
add(w, igraphics())
a <- rnorm(100)
plot(density(a))
islider(1, window=w, handler=function(h,...)
    plot(density(a, bw=get.value(h$obj)/300)))
visible(w,TRUE)

More highly interesting software packages can be found here:
-> http://www.rosuda.org/software/