Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
TwistedWave - TwistedWave is one of the unique audio editors that allow you to edit your music file online without any installation.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Radium - Radium is a music editor with a new type of interface.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.