WaveShop - Open source audio editor

Sonic Pi - Sonic Pi is a new kind of instrument for a new generation of musicians. It is simple to learn, powerful enough for live performances and free to download.

TwistedWave - TwistedWave is one of the unique audio editors that allow you to edit your music file online without any installation.

SuperCollider - A real time audio synthesis engine, and an object-oriented programming language specialised for...

Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.

ChucK - A strongly-timed music programming language