BizHawk is a multi-platform emulator with full rerecording support, and Lua scripting. BizHawk focuses on core accuracy and power user tools while still being an easy-to-use emulator for casual gaming.

Supported platforms
Apple II
Atari 2600
Atari 7800
Atari Lynx
ColecoVision
Game Boy, Super Game Boy, and Game Boy Color
Game Boy Advance
NEC PC Engine (AKA TurboGrafx-16), including SuperGrafx and PCE CD
Nintendo 64
Nintendo Entertainment System, Famicom, Famicom Disk System
Sega Master System, Game Gear, and SG-1000
Sega Genesis
Sega Saturn
Super Nintendo Entertainment System and Super Famicom
TI-83 graphing calculator
Wonderswan and Wonderswan Color

Unreleased
Commodore 64
Mattel Intellivision
Sony PlayStation
Sony PlayStation Portable