pSX is described as 'PSX is an emulator of the PlayStation video game console for x86-based PC hardware. It is Windows and Linux compatible. The original game CDs can be used to play the games. ISO files are also supported. Graphics quality may be dependent on the power of the hardware' and is a Game Emulator in the Gaming Software category. There are more than 10 alternatives to pSX for a variety of platforms, including Windows, Linux, Mac, Android and iPhone. The best alternative is RetroArch, which is both free and Open Source. Other great apps like pSX are ePSXe (Free), DuckStation (Free, Open Source), OpenEmu (Free, Open Source) and Mednafen (Free, Open Source).
ePSXe (enhanced PSX emulator) is an emulator of the PlayStation video game console for x86-based PC hardware. ePSXe makes use of a plugin system to emulate GPU, SPU, and CD drive functions, similar to the model first introduced in PSEmu Pro.
DuckStation is an simulator/emulator of the Sony PlayStation(TM) console, focusing on playability, speed, and long-term maintainability. The goal is to be as accurate as possible while maintaining performance suitable for low-end devices.
Open Emu is an open source project to bring game emulation to OS X as a first class citizen, leveraging modern OS X technologies such as Cocoa, Core Animation and Quartz, and 3rd party libraries like Sparkle for auto-updating.
Ludo is an Emulator Frontend able to run retro video games. Ludo does not emulate the consoles itself, but does it through emulator plugins called libretro cores. Libretro cores are well known emulators (like Snes9x or Genesis Plus GX or PCSX) stripped from their user interface.
A front-end or user interface (UI) is the presentation and interaction layer of an app or website. Most modern emulator apps have basic game list UIs that you can interact with using a mouse/keyboard but not a game controller.
RetriX is an emulator front end for UWP, on all the hardware platforms it supports: it serves the same purpose as RetroArch but is built from the ground up to integrate as well as possible with Windows.
MESS emulates portable and console gaming systems, computer platforms and calculators. The project strives for accuracy and portability and therefore is not always the fastest emulator for any one particular system.