AportisDoc - Carry Hundreds of books in the Palm of your hand. There's no limit to what you can read on your portable device using AportisDoc. Important information at your fingertips with AportisDoc. CSpotRun - CSpotRun is a small, simple, and very, very affordable document reader.
Source code is available.
Doc Reader for Java - Doc Reader for Java allows PC users to view documents of unlimited length in Doc format. This is the compressed text format used by programs such as AportisDoc and TealDoc for viewing large documents on the 3Com PalmPilot or Palm III computers. With Doc Reader, users can view the same documents on their desktop computers as on their PalmPilots. This program is freeware. To Go eliminates the need to carry your bulky laptop just to refer to your desktop word processing and spreadsheet files.