A portable, multi-platform, command-line driven graphing utility
A famous scientific plotting package, features include 2D and 3D plotting, a huge number of output formats, interactive input or script-driven options, and a large set of scripted examples.
Fingering chart generator for brass wind instruments
This Windows app generates fingerings for brass wind instruments. It invokes gnuplot to make a diagram showing the harmonic and error for the selected fingering, as well as for alternate fingerings. The program finds all fingerings within an acceptable error range, then chooses the one with the lowest harmonic (shortest tubing length). If no fingering falls in the acceptable error range, the closest match is chosen.