*Arranger: An outliner that allows ideas to be arranged in a tree structure.  Its drag-and-drop interface makes it easy to organize your thoughts and plans logically.  The outlines can include notes up to 32K and links to the built-in applications.
Developer page: Olive Branch Software

Bonsai: An outline program with one step synchronization to a companion Windows desktop application.
Developer page: Natara Software 

BrainForest: Create and edit outlines, checklists, and projects on your Palm OS® handheld.
Developer page: Ultrasoft

BugMe!: Sketch pad for Palm OS® handhelds.  Allows you to take notes in your own handwriting or with Graffiti text -- and to use those notes as alarms.
Developer page: ElectricPocket

Dictionary/Thesaurus Expansion Card: Merriam-Webster's Collegiate Dictionary, 11th edition and the Franklin Thesaurus for your Palm m125, m500 or m505 handheld.
Developer page: Palm

DiddleBug: Sketch pad for Palm OS® handhelds.
Developer page: Mitch Blevins/Peter Putzer

PalmLaw Graffiti Shortcuts: Adds over 120 law-related terms to your Graffiti shortcuts. (Note: Installing this file will overwrite your current shortcuts configured in your "Prefs" file)
Developer: PalmLaw (6K .zip file),

SpellMan: Check and correct misspelled words on your Palm OS® handheld.
Developer page: Stand Alone

TextPlus: Speeds up text entry by providing a frequency of use based list of word choices once you enter a few letters.
Developer page: SmartCell

Thesaurus/Spelling Checker: Use your Palm OS® handheld as a thesaurus and spell checker.
Developer page: DDH Software

ThoughtManager: A powerful student tool for organizing homework and grades, taking notes, creating outlines, gathering research, and more.
Developer page: Hands High Software

Webster's New World College Dictionary: Official dictionary of the Associated Press. Over 160,000 entries. Uses the Palm Reader.
Download site: eReader.com