From Khmelyov Software:
TrayOS is a small program designed to make working with Google's products faster and easier by utilizing similar functions to those found in the upcoming operating system from Google, ChromeOS. However, unlike Google's operating system, it is designed to be used from within Windows so you can still enjoy many of its features without having to worry about using a different OS and being unable to use your Windows applications. It gives you quick access to all the Google products that you use such as access to your mail, Google documents, chat and pictures. In addition, it also allows you to work more efficiently with Google's web development and advertising tools such as Analytics, Translator, Adsense and Adwords. Using TrayOS will allow the most commonly used Google programs to be stored in memory and started automatically in background mode.