RetroArch is a cross-platform, sophisticated frontend for the libretro API. Developed by libretro
License: Open Source
ePSXe is focused solely on PS1 emulation with a user-friendly interface and good graphics options, making it ideal for PS1 enthusiasts. RetroArch, on the other hand, is a multi-console emulator that offers extensive customization and support for various systems, making it more versatile but potentially overwhelming for new users.