How to install...

• R: (a statistical programming package. Doubles as a powerful matrix package. Released under the GPL).
• RStudio: A integrated development environment for R. It is the best interface for creating and editing code for R.
• Rcmdr: (A GUI interface to the statistical commands of R. Released under the GPL).
• GNU Emacs: (a popular editor. Stands for "Editor Macros". Released under the GPL).
• GNU Emacs + EmacsW32: (Latest CVS Emacs with additional patches to make Emacs easier for windows users to use. Recommended when installing R on windows. Released under the GPL).
• Integrating R with Emacs
• Notepad++ Windows only all purpose replacement for window's notepad. It's features include syntax highlighting and folding, auto-completion, and many other features. Coupled with the NppToR add on package for Notepad++, it turns Notepad into an editor/executor or R code, and is equivalent to the ESS package for Emacs.
• Tinn-R Windows only editor/executor of R code. Essentially equivalent to the ESS package for Emacs.
• Feedreader: (an open source RSS feed feader for Windows. Released under the GPL).
• VNC using SSH tunnels (with Putty): The free edition of RealVNC is released under the GPL. Putty is an SSH client for Windows. It is released under the MIT license, which is similar in effect to the BSD license. Regardless, it is free software also.