Webform
This module adds a webform nodetype to your Drupal site. Typical uses for Webform are questionnaires, contact or request/register forms, surveys, polls or a front end to issues tracking systems.
Administration menu
Administration menu module provides a theme-independent administration interface (aka. "navigation", "back-end") for Drupal. It's a helper for novice Drupal users coming from other CMS, a real time-saver for Drupal site administrators, and definitely
Content Construction Kit (CCK)
The Content Construction Kit allows you to add custom fields to nodes using a web browser.
Lightbox2
The Lightbox2 module is a simple, unobtrusive script used to overlay images on the current page. It's a snap to setup and works on most modern browsers.
XML sitemap
The XML sitemap module creates a sitemap that conforms to the sitemaps.org specification. This helps search engines to more intelligently crawl a website and keep their results up to date. The sitemap created by the module can be automatically submit
Chaos tool suite
This suite is primarily a set of APIs and tools to improve the developer experience. It also contains a module called the Page Manager whose is to manage pages. In particular it manages panel pages, but as it grows it will be able to manage far more
Panels
The Panels module allows a site administrator to create customized layouts for multiple uses. At its core it is a drag and drop content manager that lets you visually design a layout and place content within that layout.
abuse
This module allows users to flag nodes and comments as offensive for the adminstrator to review.
The admin can specify which type of nodes are allowed to be flagged.
Accessibility
The Accessibility Module allows hand-held devices access to a correctly formatted web site specifically made for mobile browsers from one code base. This means that the site owner does not need to create separate versions of the site.
ACH Payment Gateway
ACH Direct is a US based members-only merchant card processing service. This module provides integration of the eCommerce package with the ACH Direct paymentsgateway.net server.
Boost
Price: FREE
Version
6.x-1.0-rc2
This module provides static page caching for Drupal enabling a very significant performance and scalability boost for heavily-trafficked Drupal sites that receive mostly anonymous traffic.
Internationalization
Price: FREE
Version
6.x-1.1
Provides content translation -nodes and taxonomy-, interface translation for anonymous users -with the locale module- and browser language detection. Includes a block for language selection and manages translation relationships for nodes and taxonomy
Activity
Price: FREE
Version
6.x-1.2
The Activity module keeps track of the things people do on your site and provides mini-feeds of these activities in blocks, in a specialized table, and via RSS.
Add to Any Share/Save/Bookmark Button
Price: FREE
Version
6.x-2.3
Add to Any's Share/Save widget helps readers share, save, bookmark, and email your pages and stories using any service, such as Delicious, Digg, Facebook, Twitter, and over 100 more social bookmarking and sharing sites. Services are updated automatic
Admin
Price: FREE
Version
6.x-1.0-beta3
The admin module provides UI improvements to the standard Drupal 6 admin interface. It implements some of the ideas being explored for usability improvements in Drupal 7, including those by the Drupal usability team, Mark Boulton and Leisa Reichelt.
AdSense
Price: FREE
Version
6.x-1.2
This module provides web content providers with the means to earn revenue from visitors by displaying ads from Google AdSense™ advertising service on their sites.
Advanced Forum
Price: FREE
Version
6.x-1.1
Advanced Forum is a theme/glue module that enhances Drupal's core forum module. The included styles provide the look typically found in stand alone forum software and the code provides some of the functionality, mostly related to the end user experie
Advanced Profile Kit
Price: FREE
Version
6.x-1.0-beta1
Advanced Profile Kit provides building blocks for putting together fancy user profile pages like those commonly found on social networking sites. It is meant to work with Panels, though the provided pieces can be used in the theme layer if you prefer
AES encryption
Price: FREE
Version
6.x-1.3
This module can provide you with readable passwords. Some users will be able to see other users passwords in plain text if they have a role with the permission to do so.
Affiliate
Price: FREE
Version
6.x-1.3
This module allows site owners to issue affiliate links to their partners. When anonymous users follow these links, the clicks are counted by affiliate, day, and optional keyword. When referred users sign up for an account, the account is associated
