AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
FrontPage is a program for developing and maintaining websites.
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.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.