About a week ago octave 3.0.0 was released. It is one of my favourite tools to do a fast calculation but it is capable of doing a lot of different kinds of numerical tasks. One aim of the developers is to be compatible to Matlab — they ignore obvious stupid behaviour of Matlab, though — so one major change of this new version is the new plotting system. Read the news file. Just a little comment to a small new feature: after every exit octave now writes something like # Octave 3.0.0, Sat Dec 29 13:15:13 2007 CET into the history file. As mentioned I often start octave to enter only one or two lines so my file would include a lot of these lines. To deactivate this feature add history_timestamp_format_string(""); to your .octaverc.