Yes, I know the standard Drupal modules are very useful, but there are 5 add on modules that can really add to your site. 

Here are the top 5 most useful Drupal modules:

1) Google Analytics: Google offers a great statistics package for your website called Google Analytics. This module allows you to automatically add support for it to your Drupal site. 

2)  Graphstat: Like Google Analytics? Want more Drupal specific information? Look no further than the Graphstat module. It breaks out Drupal specific information for you in an easy to read page. 

3)  Image and Img_asst: The Image and Img_asst modules bring the ability to upload pictures to your Drupal site. By itself, Drupal doesn't allow you to upload images. You have to point to a URL to display a picture. These modules allow you to upload pictures easily and with great control. 

4) Similar Entries: This module creates a block that lists entries that are similar to the one you're reading. This helps people visiting your site find more information.

5) System Information: Have you ever wanted to see system specifics about your Drupal install? How about things like PHP version and database information? System information brings all that to you in a single screen inside of Drupal. 

These five modules make using and running a Drupal site much easier.