WaveShop - Open source audio editor
LMMS - Make music with a free, cross-platform tool
TwistedWave - TwistedWave is one of the unique audio editors that allow you to edit your music file online without any installation.
Ardour - Record, edit, and mix on Linux, Mac OS X, and Windows.
Radium - Radium is a music editor with a new type of interface.
Reaper - Reaper is a focused digital audio workstation (DAW) developed by Cockos. In the creation of the software, the digital audio technology company intended to make audio editing accessible to the masses.