Account Switcher for Google Hangouts™ is a free add-on tool that allows users to switch their Google accounts when joining a Hangout. It is available on the Chrome platform and was developed by Dean Sofer.

With this extension, users can easily swap their active user account when they fail to connect to a Google+ Hangout. As of now, the extension only supports two authenticated users, but there is a possibility of including more users in future updates.

Overall, Account Switcher for Google Hangouts™ is a useful tool for those who frequently use Google Hangouts and have multiple accounts. It is easy to use and provides a quick solution to switching between accounts.