I discovered FLEXIcontent recently and have already built a business directory, events list, and a few other applications for my site.
This CCK integrates smoothly with Joomla's categories, articles, and other plugins. It extends Joomla with a variety of custom fields and provides templating capabilities for articles.
Even if you have basic HTML and CSS knowledge (like me) you can do a great lot with FLEXIcontent!
