Christian Classics Ethereal Library PalmDocs
A large online library of classic Christian books available for download in Palm Doc format. Many other formats are available.
Edgar's Pilot BibleDoc Page
Offering several Books of the Old and New Testaments for 3Com Palm or USR Pilot; links.
Plucker Book Repository
Provides classic public domain books in Plucker format and in HTML for easy conversion to other formats, with a focus on being easily readable on handheld devices.