There are hundreds of add-on products to the WebSTAR server, allowing you to provide features like database access, scheduling, forms and surveys, an online store, and more.
For information on third-party add-ons, you can browse the following web sites:
http://www.starnine.com/extendingwebstar.html
This page presents many add-on products via a searchable and browsable database.
http://www.netprolive.com/
Another page with lists of useful add-ons. Use the Internet Products Search form and look for "Server - Helper" or "Server - Plugin/CGI".