Nivio has started beta tests of a Windows XP hosted desktop service, which it claims can stream a desktop to any compatible browser so you can remotely access Windows apps on Linux, a Mac, or even a handheld device. The desktops include a stack of free applications such as OpenOffice, Mozilla Firefox and Thunderbird, Google and Yahoo! instant messaging clients, Quicktime, and Adobe Reader. The various Microsoft Office apps are available too at extra cost, and while Nivio users cannot install their own apps, they can request that other programs be added to the supported list.