New or Updated for TeamCity

Queue Manager

(bundled since TeamCity 8.0) allows you to pause the TeamCity build queue manually.

Page colorizer greasemonkey script

colors TeamCity pages background red/green depending on the displayed build's status.

Password reset

Adds a 'password reset' link to the login screen and allows you to reset password without disturbing the TeamCity Administrator.

Meta-Runner

adds the ability to create runners from xml.

Microsoft SDKs Detector

detects Microsoft SDKs (Azure SDK, Windows Phone SDK and ASP.NET MVC) on the agent and exposes configuration parameters.

Node.js Service Messages

an npm package for generation of TeamCity service messages in Node.js.

Linux System Properties

- provides Linux OS-specific parameters on an agent.

Groovy plug

example for TeamCity extensions in Groovy.

JIRA reporter

adds comments/modifies JIRA issues on TeamCity builds.

Gerrit Changes Status Update

a Gerrit Verification build runner which calls ssh gerrit command to Label Verify.