FogBugz Plugins
FogBugz Plugins, installed directly onto your FogBugz server, allow you to customize and extend your FogBugz site so that it meets your unique requirements. Plugins can add new features, modify existing functionality, and make FogBugz integrate with other applications.
To be alerted of new Plugins from Fog Creek and third-party developers, subscribe to the
Fog Creek Developer Newsletter.
Extras and Add-Ons
In addition to the Plugin API, the FogBugz XML API allows any web-enabled application to communicate with a FogBugz site.
The Extras page lists all of the offerings from Fog Creek Software and third-party vendors that use the FogBugz XML API.
Featured Plugins
By QASymphony
Automatically Documents Intelligent Screenshots of a Defect with Seamless Submission to FogBugz
By Fog Creek Software 
While editing a case, allows a user to schedule a reminder notification or other future event.
By Cinergix
Add UML, Flowcharts, Wireframes / UI Mockups, Mindmaps and more to Wikis and Cases
By Albrektsen Innovasjon AS
Provides extended reports from the WorkingOn timesheet information
By John Fuex
FNN - FogBugz News Network (Extended Reporting)
By Balsamiq SRL
Lets you add wireframes to your cases and wiki pages.