LMMS - Make music with a free, cross-platform tool
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
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.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
FL Studio - Image-Line's FL Studio, now on it's 12th version, is a well-known music production suite and the most popular beat processor on the market, due no doubt to its longevity. Read more about FL Studio.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.