YouOS offers a number of common applications online through an web browser which includes email, word processing, instant messenger and RSS reader applications. Additionally, simple applications are offered like the Flickr search application which I have shown below.
The common word processing application is shown here and is called YouOS RichTextEditor.
I am just skimming the surface with what YouOS has to offer. The possibilities are endless because you can also create your own applications on the flexible YouOS platform. With YouOS its all about you - so tinker to your heart's content.
For updates on YouOS be sure to check out the YouOS blog.