Dragon Bane 1 is a Greyscale Dungeon Crawler RPG from Mythological Software. Their website is still online though it hasn't been updated since 2008. All links to purchase and activate the full game are dead.

From their website -

Dragon ...

Six sides not enough? Roll a whole collection of dice arranged in a user-friendly layout that makes it easy to decide the fates of many different kinds of game. Dice Roller works great for D&D, Dungeon Crawl Classics, Pathfinder, and more. Tested ...

A source port of Quake for Palm OS originally by yoyofr92 and later enhanced by MetaViewSoft. May require UDMH if not enough dynamic memory is free.

ZQuake requires an external SD card. To install, put the included ...

Hate Graffiti? Want a system that can actually read your handwriting? Then Jot by CIC is for you! Jot is already pretty powerful, but you can actually train it to your specific handwriting, and tune it to match your needs.

Jot was so successful ...

Are you looking for an advice? Just ask MTV's angsty teen Daria Morgendorffer on your Palm device with Dear Daria. Cynicism galore!

Partnered with MTV.COM, MINOR DEMONS is proud to introduce Dear Daria, the only palm app to officially feature ...

SunVox is a small, fast and powerful modular synthesizer with pattern-based sequencer (tracker). It is a tool for those people who like to compose music wherever they are, whenever they wish.

Demo:

Read no further if you have deadlines to meet. Bubblet is a puzzle game for color and grayscale Palm OS devices that is simply addicting. Match similar patterned bubbles together in order to burst them from the board. The more bubbles you burst at ...

Lode Runner is a 2D puzzle-platform game, published by Broderbund in 1983. The player controls a character who must collect all the gold pieces in a level and get to the end while being chased by a number of enemies. It is one of the first games to ...

NekoCat is a simple virtual pet simulator for Palm OS. Use the icons at the top right to interact with the cat!

What a cute little cat!

Agenda is a light-weight, yet functional replacement for Palm OS' somewhat limited Datebook. It contains an additional view, and the ability to add tasks with a checkbox that move along with the day as long as they remain unfinished, all this while ...