What is a 'Custom Firmware'?!

Game backups
Backups
CTF Themes
Themes
Homebrew
Homebrew
Emulators
Emulators
VHS/Recovery
Features
Plugins
Plugins

Emulators

Popular types of homebrews apps are emulators, which allow users to play backups of their old games (very good list can be found here).


Our recommendations:

gPsp kai 34 Test3

GameBoy Advance Emulator

Download

Masterboy 2.10

GameBoy & Gameboy Color Emulator

Download

DaedalusX64 R1878

Nintendo 64 Emulator

Download

MVSPSP 2.3.1

NeoGeo Emulator

Download

Snes9xTYLmecm 0.4.2

Super Nintendo Emulator

Download

NesterJ AoEX R3

NES Emulator

Download

PSP2600 v1.2.0

Atari2600 Emulator

Download

Check out emuparadise.me


How to install Emulators & ROMS:


Of course, there are other ways to run emulators on PSP, such as Half-Byte Loader (it has not been ported to 6.61 yet), but using CFW is generally considered to be a better option.