Xournal is an application for notetaking, sketching, keeping a journal using a stylus. It is free software (GNU GPL) and runs on Linux (recent distributions) and other GTK+/Gnome platforms. It is similar to Microsoft Windows Journal or to other alternatives such as Jarnal, Gournal, and NoteLab.
Previous versions: [0.4.7] [0.4.6] [0.4.5] [0.4.2.1] [0.4.2] [0.4.1] [0.4.0.1] [0.4] [0.3.3] [0.3.2] [0.3.1] [0.3] [0.2.2] [0.2.1] [0.2] [0.1.1]
Win32 binaries of version 0.4.7 are also available (experimental - use at your own risk!)
Xournal aims to provide superior graphical quality (subpixel resolution) and overall functionality; however it lacks the collaborative features of Jarnal. Since Xournal is still in its early development stages, it may not be fully stable, and some features have not been implemented yet.
Here is a screenshot of the user interface (click to enlarge):
