Developing Programs for Palm OS in the Present-Day
Documentation:
Palm OS Programmer’s Reference
Palm OS Programmer’s Companion: Volume 1
Palm OS Programmer’s Companion: Volume 2
Guides:
Compiling and building Palm-OS-Applications on Ubuntu 20.04 LTS (64 Bit)
Debugging PalmOS and PalmOS apps with CloudpilotEmu
Palm OS SDK Versions
Collections of Palm OS SDK's on Github by jichu4n
Modern Development Tools
Old PRC-Tools GCC Compiler (good documentation)
Modern GCC Compiler by DmitryGr
Reko Decompiler - supports basic Palm OS decompilation
Various Libraries
Mathlib
NSBasic for Palm OS
Plua - Lua for Palm OS
MojaveGL 2D Library
Other Useful Dev Resources
https://handheldbreadcrumbs.github.io/palmresources/
https://github.com/pmastrosimone/palm-dev-docs
Documentation of the PRC file format
Current/Active Open-Source Palm Projects:
Palmkedex - Pokedex for Palm OS
uGB by Tavisco & Dmitry.Gr
Conway's Game of Life by Robbie Nesmith
PalmWordle by Robbie Nesmith
Palmdle by Lana Chan
Markdown Editor by Piero Mastrosimone
Historical Open-Source Palm Projects:
Lemmings by Aaron Ardiri
GameBoy Emulator by Aaron Ardiri
Maryo Bros by Aaron Ardiri
3D Napalm Racing by Alexander Semenov
SiEd Text Editor by Benjamin Roe
Apple II Emulator by Hilary Cheng & David Schmenk
DopeWars by Matt Lee
Space Trader by Pieter Spronck
VT100 Emulator by Brian Swetland and Vassilii Khachaturov
Diddlebug by Peter Putzer
Phoinix Gameboy Emulator by Bodo Wenzel
Hi-Launcher by Radoslaw Nowak
Yahdice by Mirek Wojtowicz
SoundRec by Ryan Rife