Project64K (PJ64K) : Unofficial Version of Nintendo 64 Emulator with Multiplayer Netplay Support
Project64K is a Nintendo 64 emulator. It is a Modified version of the Project64 emulator that supports multiplayer games using the Kaillera network.
Super Mario Bros. X (SMBX) : The Ultimate Fan-Made Mario Game, Tribute to Super Mario Series of All Time
Super Mario Bros. XÂ is a massive Mario fan game that blends elements from Super Mario 1, 2, 3 and World. It has many power ups, such as the Ice Flower, Hammer Suit, Tanooki Suit, Kuribo’s shoe, The Billy Gun, and Yoshi.
Cxbx : The World’s First Ever Real Microsoft Xbox Emulator
Cxbx is currently considered as the most powerful Microsoft Xbox emulator which has the more complete features! This may not actually be an emulator to some people but everyone considers it one.
Dolphin : The First Real Playable Nintendo GameCube /Wii /Triforce Emulator for PC /Mac /Linux in the World
Dolphin is an open-source Nintendo GameCube, Wii, and Triforce (the arcade machine based on the Gamecube) emulator for Microsoft Windows, Linux, and Mac OS X (Intel-based).
[PS2] Contra: Shattered Soldier (Shin Contra, True Contra)
All of the action and adrenaline of the Contra series comes to the PlayStation 2 with Contra: Shattered Soldier. This time, you can carry three weapons–machine gun, flamethrower, and grenade launcher–as you battle enemies either solo or cooperatively with a friend.
PCSX2 (PS2 Emulator) : The Best PlayStation 2 Emulator for Windows and Linux
PCSX2 is a PlayStation 2 emulator for Windows and Linux, started by the same team that brought you PCSX (a Sony PlayStation 1 emulator). Currently,with a high end PC it can emulate hundreds of games at full speed !