Chrome Remote Desktop

Chrome Remote Desktop is an official Google Chrome extension which can be found on the Chrome Web Store.

Official Description
Access other computers or allow another user to access your computer securely over the Internet. Chrome Remote Desktop BETA allows users to remotely access another computer through Chrome browser or a Chromebook. Computers can be made available on an short-term basis for scenarios such as ad hoc remote support, or on a more long-term basis for remote access to your applications and files. All connections are fully secured.

Chrome Remote Desktop BETA is fully cross-platform. Provide remote assistance to Windows, Mac and Linux users, or access your Windows (Vista and above) and Mac (OS X 10.6 and above) desktops at any time, all from the Chrome browser on virtually any device, including Chromebooks.