playwith (version 0.9-11)
A GUI for interactive plots using GTK+
Description
A GTK+ graphical user interface for viewing and interacting with R plots.
  It tries to work out the structure of a plot, in order to interact with it.
  The built-in features include: navigating the data space, identifying data points,
  editing and annotating the plot, and saving to a file. New tools can be defined.
  Also includes latticist, a lattice-based tool for exploratory visualisation.