Remote Preview is a free and open source tool developed by viljamis. It is a Chrome extension designed for open device labs, allowing users to preview any URL on a large number of mobile devices simultaneously.

With Remote Preview, users can simply enable the extension and enter a URL. The extension automatically loads the URL on each connected device. It also supports tab changing, making it easy to navigate through different pages of the website being previewed.

This tool is compatible with various platforms including Android, Blackberry, iOS, Maemo, Meego, Symbian, Windows Phone, and WebOS. It provides a convenient way to test website compatibility and responsiveness across multiple mobile devices.

Please note that in order to use Remote Preview, users must have a working Remote Preview script running on a server or localhost. More information about setting up the script can be found on the developer's website.