RSS Feed Creator
the #1 extension to do RSS Feed stuff for a Joomla! site, create unlimited feeds

$199
Full-Text RSS
Joomla Automatic Articles solution, captures entire articles from RSS sources.

$199
Twitter Application
implement independent Twitter interface with some extra killer features

$199
PHPlist Integration
the #1 solution to use the most powerful newsletter PHPlist inside Joomla!

$199
Suggestions
This helps you collect idea/feedback/suggestion from your clients/visitors.

$199