ePSXe Faqs, Tips
ePSXe (enhanced PSX emulator) is a PlayStation emulator for x86-based PC hardware with Microsoft Windows or Linux, and now on the Android. It was written by three authors, using the aliases "Calb", "_Demo_", and "Galtor". ePSXe is closed source with the exception of the application programming interface (API) for its plug-ins.
PCSX2 Faqs, Tips
PCSX2 is an open-source PlayStation 2 (PS2) emulator for the Microsoft Windows, Linux and OS X operating systems. In its latest stable release, many PS2 games are playable, and several games have full functionality. The main bottleneck in PS2 emulation is emulating the multi-processor PS2 on a PC x86 architecture. Although each CPU can be emulated well, accurately synchronizing the CPUs is very difficult.
nullDC Faqs, Tips
nullDC is an open source Sega Dreamcast and Sega Naomi videogame systems emulator for Microsoft Windows and other platforms.
After not being updated for almost two years, the project's author "drk||Raziel" announced his decision to release the source code with his newest build.
Emulators Faqs, Tips