https://github.com/PeterLemon/PSX - PlayStation Bare Metal Mips Assembly Programming
http://onorisoft.free.fr/psx/psx.htm#Tutorials - Orionsoft's PSX Programming Tutorial Series
http://hitmen.c02.at/html/psx.html - Hitman's Playstation Archive : Great info & resources (last updated 2013) regarding programming on the Playstation 1.
https://jum.pdroms.de/PSX/psxdevstart.html - James' PSX Getting Started Tutorial: Great info (last updated 2013) regarding programming on the Playstation 1.
https://archive.org/details/webyaroze.7z - Net Yaroze Website Backups : Includes a bunch of official documentation, various tools & updates for pc/mac, as well as tutorials & samples for developing for the PS1 and Net Yaroze.
https://github.com/MatthewJohn/JurgHurg-PS1-tutorial - PS1 Homebrew Tutorial Code examples from Jurg Hurg Source from videos.
https://github.com/giulioz/PSX-Example - Example for building programs for Sony Playstation 1 (PSX), using Docker.
https://github.com/Bigbudddo/psx-pong - A repo for building and learning how to create games for the Playstation 1 (PSX). It will be a simple game of Pong.
https://github.com/williamblair/PSX_App - Class for making Playstation 1 apps using PSYQ
https://www.retroreversing.com/ps1/ - PSX section of retroreversing.com