http://www-128.ibm.com/developerworks/ibm/osource/index.html

modules

list of Modules

http://drupal.org/project/localizer

http://civicrm.org/
- civiCONTRIBUTE Online fundraising and donor management.
- civiEVENT Online event registration and participant tracking.
- civiMEMBER Online signup and membership management.
- civiMAIL Personalized email blasts and newsletters.

Liquid Wiki

http://drupal.org/project/nice_menus

http://drupal.org/project/google_analytics

Contributed modules status - version 6.x

Enable users to create and manage their own 'groups'

Internationalization

room booking

voice comment with drupal plugin talking stick

Dates And Time Zones In Drupal

http://agaricdesign.com/modules-to-consider-drupal-5

event schudaling

good sample

like

webcalendar

Some of the new features in 1.1/1.2:

   * RSS syndication of calendars
   * Read/Write sync through Apple iCal or Mozilla Sunbird
   * Fancy new web-based install/update wizard (creates your database tables for you!)
   * Much better support for the iCal standard (if you need complicated recurrance rules)
   * Advanced user access control
   * Multiple public calendars (using nonuser calendars)
   * Full Timezone support
   * Remote calendar subscriptions (a new special type of nonuser calendar)
   * Database query caching (greatly improves performance)
   * CSS and javascript are now called as external files and cached in the browser (big performance boost)
   * VTODO (Tasks) are now supported as part of the iCal standard updates
   * Self Registration with optional IP blacklisting and password autogeneration
   * A spiffy menu system that will optionally replace the links at the bottom of the pages
   * PhpMailer has been incorporated, allowing use of phpmail, SMTP (w/ auth), and sendmail protocols
   * Themes can now simplify the customization of your WebCalendar look and feel.