The Dude - MikroTik is a Latvian company which was founded in 1996 to develop routers and wireless ISP systems. MikroTik now provides hardware and software for Internet connectivity in most of the countries around the world.
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Pandora FMS - Pandora FMS: Opensource monitoring software
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.
OpenNMS - Project home page of OpenNMS - a java based network managememnt platform developed under the Open Source model
Chef - Automation for all of your technology. Overcome the complexity and rapidly ship your infrastructure and apps anywhere with automation.