Apache is a free and open-source cross-platform web server software.
ProcessWire is an open source content management system (CMS) and framework (CMF).
Underscore.js is a JavaScript library which provides utility functions for common programming tasks. It is comparable to features provided by Prototype.js and the Ruby language, but opts for a functional programming design instead of extending object prototypes.
Unix is a family of multitasking, multiuser computer operating systems.