Views http://drupal.org/project/views
Content Construction Kit (CCK) http://drupal.org/project/cck
Token http://drupal.org/project/token
Pathauto http://drupal.org/project/pathauto
Global Redirect http://drupal.org/project/globalredirect
Google Analytics: http://drupal.org/project/google_analytics
Poor Man's Cron http://drupal.org/project/poormanscron

File Field http://drupal.org/project/filefield
# ImageField: Upload widget for FileField that shows an image preview, with support for ALT and Title text.
# FileField Podcaster or iTunes: Create podcast feeds using Views and FileField.
# SWF Tools: A set of media players for playback of audio and video files.
SWF Tools: A set of media players for playback of audio and video files.

Aquia Distribution
http://acquia.com/products-services/acquia-drupal-modules
Image Allows uploading, resizing and viewing of images.
Image Attach Allows easy attaching of image nodes to other content types.
Image Gallery Allows sorting and displaying of image galleries based on categories.
Image Import Allows batches of images to be imported from a directory on the server.
ImageMagick Advanced Options Adds advanced options to the ImageMagick image toolkit.
Image Assist Enables users to upload and insert inline images into posts.
ImageAPI Provides ImageAPI supporting multiple toolkits.
ImageCache Allows you to dynamically manipulate and cache images.
Lightbox Used to overlay images on the current page.
Webform Enables creation of questionnaires, contact or request/register forms, surveys, and polls.
Tagadelic Makes weighted tag clouds from your taxonomy terms.
Mollom Protects against comment and contact form spam.
Comment notify Sends notification e-mails to visitors about new comments on pages where they have commented.
Calendar Displays any Views or CCK date fields in calendar formats.

Also: Audio
Panels

Social Bookmarking:
http://drupal.org/project/addthis