Purpldragon,
The backbone of any drupal installation is usually:
- CCK
- Views
- Pathauto
- Global Redirect
- Admin Menu (that's for the developers and a god send)
- Devel
- Block Cache
- LoginTobboggan
Ladybug Markets uses these plus:
- Ubertcart
- UC Marketplace
- Advanced Profile Kit
- FAQ
- Buddylist
- Views
And some little gems I found along the way:
- Search 404
- Page Title
- SEO Checklist
- Update Status (incl. in drupal 6.x onwards)
Most of these have excellent manuals/documentation and a lot include documentation in the drupal handbook.
Please pass the site along to all your creative (and not so creative) friends.
Harry