Freebie: Remote Desktop
Terms of use : Free
File format: Chrome browser plugin, support Windows, Mac and Linux
Website: https://chrome.google.com/webstore/detail/chrome-remote-desktop/gbchcmhmhahfdphkhkmpfmihenigjmpp
Feature: The remote function is not limit to Chrome browser itself, users can take control entire computer. It is light, fast and secure, and no annoying commercial notification. It is one of the best alternative to Teamviewer.
Screenshots:

