Entityreference prepopulate Mar 2nd, 2013 Prepopulate an entity reference field based off of values in the URI (http://mysite.com/node/add/article?field_my_entity_ref=134) Read more about Entityreference prepopulate
Filter permissions Mar 2nd, 2013 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.) Read more about Filter permissions
Style Guide Feb 26th, 2013 This shows you all the different themeable elements and lets you see how your theme renders them. Read more about Style Guide
GMap (google maps integration) Feb 23rd, 2013 (updated Feb 24th, 2013) Integrate Google Maps with Drupal. Read more about GMap (google maps integration)
OpenLayers Feb 23rd, 2013 (updated Feb 24th, 2013) Combine maps from different sources - integrates with Views and can do a ton of map related shtuff. Read more about OpenLayers
Outline Designer Feb 23rd, 2013 (updated Feb 24th, 2013) A nice admin interface for managing books. Read more about Outline Designer
Calendar Feb 23rd, 2013 (updated Feb 24th, 2013) Creates calendars - integrates with Views. If you need a calendar and don't know this module, try it :) Read more about Calendar
TableField Feb 23rd, 2013 (updated Feb 24th, 2013) "This module allows you to attach tabular data to a node in Drupal 6 or any entity in Drupal 7." Data can be exported to CSV (D7). Read more about TableField
Webform Validation Feb 23rd, 2013 (updated Feb 24th, 2013) adds the ability to validate form submission data using a bunch of preset rulesNumeric values (optionally specify min and / or max value)Minimum lengthMaximum lengthMinimum number of wordsMaximum number of wordsEqual values on multiple fieldsUnique values on multiple fieldsSpecific valueRequire at least one of Read more about Webform Validation