Google Chrome OS Launched for testing. "Chrome OS is essentially a free software," A/t Google. Google Chrome will bring down PC costs. Google's Chrome OS is lean and mean version of Linux and its also an open source OS. Chrome OS will require you to do most of your computing in the cloud. It will be lightweight, fast, secure and possibly cheaper but you won't be able to run iTunes, Photoshop, Outlook Express, Skype, Microsoft Office and most games. The "Chrome Web Store" is also open for business. In the first half of next year Chrome notebooks will be available for sale from Acer and Samsung.