AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
Drupal is a free and open-source web content management framework.
Lightbox is small javascript library used to overlay images on top of the current page.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Pinterest is an image sharing and social media service designed to enable saving and discovery of information.