Here is the idea behind Office 2.0 according to the author –
use a generic web browser and a set of online services to provide all the functionality needed by a computer user, removing the need for any application to be installed on the computer itself.
The applications are categorized in self-explanatory categories which makes it quite useful to search for specific type of online utility websites. You can browse through the application list and at the same time if there is an app which comes to your mind and not listed, you can submit it.
List of applications is quite comprehensive and includes almost every leading office website.