JARNAL collaborative notetaking, document annotating, sketching, presentations

This looks like an interesting candidate for PortableApps:

Jarnal is an open-source application for notetaking, sketching, keeping a journal, making a presentation, annotating a document - including pdf - or collaborating using a stylus, mouse or keyboard. It is similar to Microsoft Windows Journal and to the earlier Mimeo whiteboarding and Palm notepad applications.

Why is this program better than Microsoft Windows Journal or One-Note? Because it is written in Java files can be edited and viewed on any platform, and the editor/viewer is freely redistributable - not to speak of customizable.

http://jarnal.wikispaces.com/