DesktopTwo

It's also been called a WebOS although Sapotek stated on its website that the term is premature and presumptuous.

The web applications' found on Desktoptwo were built on PHP in the back end.

[1] Sapotek had liberated all the web applications found on Desktoptwo through Sapodesk on an AGPL license.

[2] In a "Cloud OS" the functionality of a server was granularized and abstracted as Web services that Web developers used to create composite applications similar to how desktop software developers use several APIs of the OS to create their applications.

Some of the features found on Desktoptwo were: File sharing, Webmail, Blog creator, Instant messenger, Address book, Calendar, RSS Reader and Office productivity applications.