DoubleClick Ad Exchange is a real-time marketplace to buy and sell display advertising space.
Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
LiteSpeed is a high-scalability web server.
phpBB is a free open-source Internet forum package in the PHP scripting language.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.