All of the large open source projects out there have great directories for extensions, plugins, service providers, and events. I thought I’d put together a growing list. Short and sweet for the moment. It will grow, don’t worry.

WordPress

• Plugins
• Themes
• Events
• Website Showcase

Joomla

• Extensions
• Service Providers
• Events
• Website Showcase

Drupal

• Modules
• Themes
• Events
• Website Showcase