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.

A module which auto-generates a skeleton or "scaffolding" for a module, along with hints on how to fill them in. Useful for newbie developers to learn how Drupal code works, and seasoned developers who are too lazy to look up what arguments a function has to take.

Use this module when you are running multiple Drupal sites from a single code base (multisite) and you need a different robots.txt file for each one.

Adds a block titled "Countdown" to count the days, hours, minutes, and seconds since or until a specified event. Can configure to just show days, or days and hours, etc.

The Endorsements module allows users to endorse each other.

Session Limit allows administrators to limit the number of simultaneous sessions per user.