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.
Kibana is an open-source data visualisation dashboard for Elasticsearch. It provides visualisation capabilities on top of the content indexed on an Elasticsearch cluster. Users can create bar, line and scatter plots, or pie charts and maps on top of large volumes of data.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.