Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Musicope - The Piano Game. Contribute to oldrich-s/musicope development by creating an account on GitHub.
Spek - Spek helps to analyse your audio files by showing their spectrogram.
Mini Piano - Mini Piano is a fun on the go App which you can use right off the bat with its intuitive interface...
SoX - Sound eXchange is a command line utility that can convert various formats of computer audio files...
Piano Time - Piano Time is a multitouch piano with 36 visible keys and 4 selectable octaves.