GUI Octave is a Graphical User Interface for the GNU Octave high-level language. GNU Octave is a pretty strong interpreted language to solve linear and non-liner problems. However, the biggest drawback is that it has a command line version only. This problem is solved by GUI Octave. It provides a free GUI for GNU Octave that lets you easily work with GNU Octave in a familiar UI, without worrying about the command line interface. GUI Octave is totally free. It runs on Windows XP/Vista/7.