xgobi
(Package: xgobi) :
XGobi: Dynamic Graphics for Data Analysis
Dynamic graphics, including brushing, rotation, grand tour, projection pursuit, slicing. Most effectively used when called more than once on same data, which then allows linked plots. Brushing with several glyphs and colors is supported. (On monochrome displays, only glyphs can be used.)
xgvis
(Package: xgobi) :
XGvis: Interactive Multidimensional Scaling Using XGobi for Display
R interface to XGvis, an interactive multidimensional scaling (MDS) program that consists of a control panel to manipulate the parameters of the MDS stress function and an xgobi window for data display. It can be used either for visualization of dissimilarity data, for dimension reduction, or for graph layout. Graph layout is usually done in 2D, but xgvis allows layouts in arbitrary dimensions, 3D being the default. It permits missing values, which can be used to implement multidimensional unfolding.
providing 
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