Some other pages on our site you may enjoy:
RTSPECT - Real-time Waveform and Spectrum Display
RTSPECT is a free program for displaying a real-time waveform and spectrum display of an audio signal on Windows computers. More information.
EFxHist - Fundamental Frequency Histograms
EFxHist is a program to analyse joint speech and laryngograph recordings. EFxHist locates each pitch period in the laryngograph waveform and produces statistical analyses including distributions of fundamental frequency, closed-quotient, jitter and shimmer. More information.