If you find the fonts of your Drupal site quite boring. The @font-your-face module could make the text of your Drupal site more fun.
provides a implementation of the 2-click-solution from heise.de for more privacy against Facebook, Twitter and Google+. This module implement the heise-jquery-code using libraries.
Respond.js is a CSS3 media query polyfill for IE 6-8, delivering lightweight, fast support for min-width and max-width.
Ubercart2 installations-/Konfigurationsanleitung
This module scans the currently installed Drupal, contributed modules and themes, re-downloads them and determines if they have been changed. Changes are marked clearly and if the diff module is installed then Hacked! will allow you to see the exact lines that have changed.
The Custom Formatters module allows users to easily create custom CCK Formatters without the need to write a custom module.
Drush Views, the Drupal Shell Views interface, allows you to list, import and export views from the command line.
This module provides hotness metrics for nodes and comments by radioactivity model. In essense, nodes or comments receiving attention are heated while inactive ones slowly cool down