Here you will find a list of the most popular Drupal modules, a short description of what they do, a download link plus how to install instructions. Please keep in mind:

When installing modules make sure you download them from known sources;
Always make backups before you start installing addons. Always!
When downloading a module for Drupal 4.6, install it on a website that runs Drupal 4.6, otherwise it will not work correctly.

This module is mostly used for selling goods and/or services. Some of the features it includes are payment and shipping components, transaction and payment workflow and reports, sales summaries, shipping notifications, donations functionality, etc.

This module will allow you to display Google Ads on your website. You will be able to change texts as well as colors and display the ads within template based themes, blocks, etc.

This module is mostly used by people who would like to track visitors and advertising campaigns on their websites. The visitors' clicks are divided into groups, thus the advertising campaigns could be tracked.

cPanel is the control panel that SiteGround customers use! With this module you will be able to create or delete email/ftp accounts, using the cPanel interface.

This module allows you to integrate Drupal with vBulletin forum. Once the integration is completed, links to the vBulletin forums and control panels will be included in the Drupal Admin Panel.

With Drupal Blogger you can display list of bloggers, number of written blogs, add a "read more link", set avatars, limit the number of bloggers shown, and much more.

This module allows instant messaging with people that are in each others' buddylists. However, it could be used only with the latest Drupal version - Drupal 4.7

This module allows you to create a site guestbook as well as individual user guestbooks, also assign an intro text on every guestbook, define text message format, and much more.

With Drupal Gallery you can integrate Gallery2 to your Drupal website. With the Gallery module you can add photos and videos to your web pages. Please note that before installing this module you should first download and install Gallery2 on your hosting account.

With Drupal E-publish you can organize newspapers, magazines, newsletters, and others. Each of the above may have several editions organized by topics. This will make your website look as it is a news website.

Google Translate will let your users read the content on your website on whatever language they want with just one click.

Drupal Event helps you to keep track of certain events. In the same time is provides API in order to allow other modules already installed to work with the saved data.