Weasel is document reader for the Palm Pilot organizers, Weasel is Free Software released under the GNU General Public License v2. Unlike other doc viewers for the Palm, Weasel uses zTXT files as its primary format. These are similar in many ways to the de facto standard format, PalmDoc, but they feature much better compression. Weasel also reads PalmDoc files, though, so donot worry. It even supports bookmarks in both formats.