New or Updated for TeamCity

AlertMePro

A TeamCity Plugin which allows to send notifications to Skype group chats and direct messages.

.NET CLI Support

Allows building projects via .NET CLI toolchain.

Browser notify

Notification for browser using web notifications API.

OAuth2 authentication

TeamCity oAuth authentication Plugin.

Tasks Build Runner

Tasks Build Runner.

JetBrains Hub

- provides integration with JetBrains Hub, allowing for single sign-on (SSO) and automatic update of user details from Hub in TeamCity.

Trac

announcement, related issue.

VersionOne

download, sources - by VersionOne.

RunAs

Adds the ability to run builds in sandboxes, under different user accounts (requires TeamCity 6.5.3).