qwt: qwt (Qt widgets for technical applications)
qwt: 
qwt: The Qwt library contains GUI Components and utility classes which are
qwt: primarily useful for programs with a technical background. Beside a 2D
qwt: plot widget it provides scales, sliders, dials, compasses,
qwt: thermometers, wheels and knobs to control or display values, arrays, 
qwt: or ranges of type double.
qwt: 
qwt: NOTE: This version of Qwt is built against Qt4 (not usable with Qt3) !
qwt: 
qwt: http://qwt.sourceforge.net/