Content Management
- CCK and Views
- Link
- Image, Imagecache, and Imagefield
- Views Bookmarks
- Modr8
User Feedback
- Fivestar and Voting API
Usability
- Printer-Friendly Pages
- Taxonomy Menu
SEO
- Pathauto and Token
- Global Redirect, Page Title, Meta Tags, Nodewords
Advertizing
- AdSense and AdSense Injector