Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
HERE is a PaaS for creating custom maps, visualize location datasets, gather insights and buy and sell location assets.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Plone is a free and open source content management system (CMS) built on top of the Zope application server.