More often than not, it's nice to have the option to easily add share links to various content of your site. While there were already some options available to provide this functionality for Drupal, they were all either fairly heavy-weight, or dependent on a third party service (namely ShareThis or AddThis), which in most cases have significant limitations on the styling options available.
Drupal Modules
Google Analytics: Per-Page
Google Analytics Per-Page adds a local menu task to the google analytics configuration to allow extra tracking snippets to be inserted on a per-path basis.
Panel Schedule
Panel Schedule provides a ctools access plugin, intended to be used for controlling visibility of panel panes, and selection of panel variants based on a scheduled start (and optionally end) date & time.
Hotel Booking System for Ubercart
This module was developed to allow hotel bookings to be placed through a drupal website, leveraging ubercart for billing & payment information handling. Built to handle the needs of both the Water Park of America and Grand Hotel Minneapolis, this module provides flexible and highly configurable pricing and availability, allows for restrictions on any room type by date, and allows any other product to be configured as an add on or upgrade item. While primarily developed for in-house use, the module was released with a GPL license to leverage the power of the drupal community to aid in testing during the development process in an effort to speed the product to market.
Ubercart: Product Power Tools
This module came about when a need arose to simplify the product add / edit forms for certain product types, so that in the event a less computer savvy individual would be working with the inventory they would have less fields to wade through to zero in on those important to them. Since its release it has become wildly successful and often times been touted as a "must have" module when working with ubercart.