Palm OS did not officially offer SD card support until OS 4. While no older devices were released with SD card readers built-in, it is possible to homebrew custom devices with a combination of older Palm OS and SD card readers.

Moose is a reimplementation of Mac OS's classic Talking Moose for Palm OS. Input some text and let your Palm device do the talking for you! Uses the CMU Flite speech synthesis engine to generate sound.

A bullet hell game where your only objective is to survive countless waves of bullets. The further you get, the more difficult it gets. Use the stylus to dodge, but beware: A trail will be momentarily created when moving fast that can be hit.

uARM is a multi-device Palm (and Pocket PC!) emulator for SDL platforms. Rather than simply emulate a Palm OS environment to boot apps, uARM emulates real hardware to boot complete ROMs.

Per the creator's

Palm Scanner USB device drivers for Windows 7/8/10 by Janam. These drivers are 64-bit compatible only.

Allows HotSync over USB with Palm Desktop.

Fly through a cave and try not to hit obstacles. There are different levels of difficulty to keep the game interesting.

MineHunt is a classic Minesweeper clone for Palm OS. Developed by 3Com/Palm themselves, this game was provided as freeware. 'MineHunt' was bundled with many Palm OS devices, alongside 'SubHunt',

Generates keyfiles for NoviiRemote Deluxe. As NoviiRemote uses keyfiles instead of plain serial codes, files must be generated uniquely for each HotSync ID.

NoviiRemote turns your Palm into a TV remote! Program your own buttons and custom layouts and ditch that pile of TV remotes for good!

NoviiRemote Deluxe works on PalmOS 4.x or newer, including Palm Centro and Palm TX. Older devices should use ...

Palm Revolt is a skinning engine that allows you to change the way your Palm OS looks! Included in this package are skins for Windows XP and Mac OS X.