PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
X-Mouse Button Control - XMouse Button Control (XMBC) allows you to create application and window specific profiles.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.