Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Nifty - Manage projects, work, and communications in one place.
Chef - Automation for all of your technology. Overcome the complexity and rapidly ship your infrastructure and apps anywhere with automation.
Intercom on Product Management - The ultimate resource for aspiring product managers
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.
productboard - Beautiful and powerful product management.