Xournal
From the Linux and Unix Users Group at Virginia Tech Wiki
Xournal is an application for notetaking, sketching, keeping a journal using a stylus. It is free software licensed under the GNU GPL that and runs on Linux and other GTK+ platforms, including the n810. It is similar to Microsoft Journal and other alternatives such as Jarnal, Gournal, and NoteLab.
Xournal doesn't support any sort of organization (like the tab-based organization in OneNote) nor multiple user interactivity (which Jarnal supports). Nonetheless, it can be a useful note-taking program when running Linux on a Tablet or even the palm-sized Nokia N810 Internet Tablet, as illustrated in the screenshot below.

