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.
Prototype is a JavaScript Framework that aims to ease development of web applications.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
SWFObject is an open-source JavaScript library used to embed Adobe Flash content onto web pages.