I work with the Drupal platform developing PHP based web sites at work. During my time doing Drupal I have developed some modules. Most are not for public use but those who are will be listed here.
Widgets
Widgets is a module that enables a site editor to, on a per node basis, select “widgets” that should be displayed when viewing a node.
SMS Reminder
Lets your users subscribe to reminders of events via SMS. Currently supports Ballou provider (swedish) but the module can easily be extended to support more providers.
Flickr Photoset Block
Depends on the Flickr module and extends it by allowing you to create any number of blocks containing Flickr photsets.
Node Picker
Provides a button in Wysiwyg supported editors that displays a list of links to content. Choosing a link inserts it into the editor.
Spotify
Provides integration with Spotify meta data API and also ships with a new CCK field, Spotify Field that lets you create Spotify links.
Better menus
Improves the standard Drupal menu item widget with a JavaScript powered tree menu.
Image Browser
Browse, upload and insert images in Wysiwyg supported editors. I’m co-maintainer on this one.
Other modules
I’ve also done a couple of modules not released to the public. Among them a module integrating the Enta ticketing system and another one integrating the Capitex real estate system with Drupal.