Module Description
Content Construction Kit (CCK) Add custom fields to nodes using a web browser
Views Create views of nodes.   Views provides a way to display content based on given parameters.
Panels Make a panel.
Drush Command line for Drupal great for doing updates.
Ubercard Shopping Cart. Has poor import support - use node import module instead for importing into Ubercart.
Code Filter Display programming code and tags in your content using either the tag or
tags so that users can post code without having to worry about escaping with < and >
Taxonomy Manager Interface for managing a taxonomy vocabulary.
IMCE IMCE is an image/file uploader and browser that supports personal directories and quota.
PathAuto Automatically create search engine friendly URLs.
Print Generate the printer-friendly versions of any node as a page, pdf, or for email.
External Links Display external links as arrows or mail symybol for email links.
Masquerade Allows easy switching of users in development.
Google Analytics Google Analytics Integration
Fckeditor WYSIWYG Editor
Meta Tags Edit Meta Tags, project was previously called nodewords. Entering Meta Tag information will improve SEO (Search Engine Optimization).
Page Title Override default page title.
Scheduler Allows nodes to be published and unpublished on specified dates
Image CAPTCHA Add Image CAPTCHA to forms.
Webform Typical uses for webform are to create questionnaires, contact or request/register forms, surveys, etc.
SimpleNews Publishes and sends newsletters to lists of subscribers
Advanced Help Allows module developers to store their help information outside of the module system.
Ubercart Shopping cart for Drupal.
LM Paypal Provides an interface to PayPal using Instant Payment Notifications (IPN). It currently supports paid memberships (subscriptions), donations (tip jar) and paid adverts (classified ads).
Content Profile Builds user profiles as content (nodes).
User Relationships Allows users to create named relationships between each other. It is the basic building block for a social networking site, or any site where users are aware of one another, and communicate.
Flag Enables the site administrator to provide flags for nodes, comments, or users. For example, bookmarks, marking important, friends, or flag as offensive. Use Views to create custom lists of popular content or keep tabs on important content.
FlashVideo Enables users to upload video files, automatically convert those videos to the popular Flash format, and then embed their video in any node type using the [video] tag.
Print Generate printer-friendly versions of any node, print exports as pdf.
Services A standardized solution of integrating external applications with Drupal. Service callbacks may be used with multiple interfaces like XMLRPC, SOAP, REST, AMFPHP(flash/flex). This allows a Drupal site to provide web services via multiple interfaces while using the same callback code. Note: As of 6/09 this module is still in development. The external application is pointed to a URL with specified argumens. Services include Node, Menu, File, System, Taxonomy, User, Views.
Notifications A complete subscriptions/notifications framework.
Links Multi-module set for managing URL links in a master directory, and attaching them in to content pages.