Portable [on-the-go] version of Scribus, an award-winning open source professional DTP with a combination of "press-ready" output and new approaches to page layout.
Portable RSSOwl is a opensource RSS, RDF, and Atom newsreader. To simply put it, it's a news feed reader. But it's portable for use on USB media.
A simple content management system.
An open source web statistics program.
A browser-based server file manager.
A simple project version control system.
Register as an author and write work to be published on the site, using one of your several "handles", so that you can write under different names without people knowning.