This site is based off the content management system, Joomla, and uses a variety of add on modules to help with management and organization of the site.
A short list of items used on the site is here:
Community Builder https://www.joomlapolis.com
DT Register
Bootstrap is a front-end framework of Twitter, Inc. Code licensed under MIT License.
Font Awesome font licensed under SIL OFL 1.1.