Java GUI for R

JGR (pronounced 'Jaguar') is a universal and unified Graphical User Interface for the R programming language, licensed under the GNU General Public License.
JGR is a cross-platform stand-alone R terminal, and can be used as a more advanced substitute to the default Rgui (on Windows) or to a simple R session started from a terminal. It provides a friendly R-console complemented by a spreadsheet-like data editor and by a script editor featuring syntax highlighting, autocompletion and (MS Excel-style) arguments-suggestions for entered functions, and direct command transfer.
Although unlike Rcmdr, RKWard, Rattle or PMG, JGR provides no statistical menu-driven facilities, recently a GUI on top of JGR has been developed: "Deducer" aims to be an intuitive graphical data analysis system in some respects similar to SPSS, Cornerstone or Minitab.