enables views infinite scrolling ( autopaging, depaging, endless pages ...you name it) by using jquery.autopager plugin. using this module with views page display will load another page whenever the user reaches bottom of the page.

Integrate QueryPath with Drupal. Mostly useful as an API. Can be used with Feeds if the Feeds QueryPath Parser module is installed.

Prepopulate an entity reference field based off of values in the URI (http://mysite.com/node/add/article?field_my_entity_ref=134)

Take control of your breadcrumbs!

This will tame the permissions page if it is getting long (like what happens when you use content permissions and have lots of different content types.)

"Provides one-way string transliteration (romanization) and cleans file names during upload by replacing unwanted characters.

Generally spoken, it takes Unicode text and tries to represent it in US-ASCII characters..."

This shows you all the different themeable elements and lets you see how your theme renders them.

Integrate Google Maps with Drupal.

Combine maps from different sources - integrates with Views and can do a ton of map related shtuff.

A nice admin interface for managing books.