Drupal 6.12 core
Active
-Blog
-Book
-Color
-Comment
-Database logging
-Help
-Path
-Poll
-Statistics
-Throttle (Not active yet but will once server is in production)
-Update status
Modules
-Administration Menu
-CCK
-Date/Time
-Calendar
-FCKEditor
-IMCE
-Nice Menus
-Workspace
-Views
-Workflow
Themes
-Deco
-Internet Services (2nd edition)
-Earthen
Some other goodies found on Drupals website for developing a complete intranet system.
http://drupal.org/node/345620
Drupal Site Recipes
http://drupal.org/handbook/site-recipes
