Free Music Instrument Tuner.

Current features:

 - Error history
 - Volume history
 - Wave shape
 - Harmonic ratios
 - Statistics
 - Microtonal tuning (with Scala file support)
 - Discrete Fourier Transform view
 - JACK, OSS, ALSA, Portaudio support
 - Translations for: french

WWW: http://home.gna.org/fmit/