MozDex.com is built entirely on Open Source systems. We utilize software from many different projects including Nutch, Apache, Jakarta, Squid and MANY other open source initiatives.
Nutch is the agent of mozdex.com - providing the web crawler and search interface that you use to do queries as well as what you will see visiting your sites. Not all of the brains of the inernet work for google and we sincerely thank the dedicated team of developers and supporters of the project that hands down makes mozdex possible!
We owe a special thanks to the entire Apache foundations. We rely on both the Tomcat Application servers as well as the Lucene index systems. This is the code that runs our index as well as provides the web interface to everything we run.