Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Chef - Automation for all of your technology. Overcome the complexity and rapidly ship your infrastructure and apps anywhere with automation.
Qiqqa - Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.