Apache is a free and open-source cross-platform web server software.
A multi-dimensional charting library built to work natively with crossfilter and rendered using d3.js
Debian is a Linux software which is a free open-source software.
Open Graph is a protocol that is used to integrate any web page into the social graph.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.