gWidgets
The gWidgets package for the R statistical computing environment provides a lightweight means to write GUIs for R within R. There are several R packages that provide access to underlying GUI toolkits on a system, such as tcltk, RGtk2, rJava and RwxWidgets. The gWidgets packages provides an interface to these packages that is toolkit independent. Although not nearly as feature rich as any of the underlying toolkits, gWidgets provides an API that allows many things to be done quite simply and in a more or less portable manner.
There are a number of examples in the Examples directory, and the package has an accompanying vignette.
07/18/2008: New versions of gWidgetsRGtk2, tcltk and rJava uploaded
Basically these are minor bugfixes and documentation tweaks to make
CRAN happy. Fixes include: gframe in gWidgetstcltk and fixes to
methods for gradio, gvarbrowser and gpanedgroup in gWidgetsRGtk2.
Future changes (hopefully) will fix up the gdf constructor in
gWidgetsRGtk2 and documentation imporvements to gWidgets itself.