BizHawk is a free and open-source multi-system universal emulator written in C#. Its goal is to eventually simulate all game consoles, and already supports FC, MD, GBA, SFC, SMS, NES, SNES, N64, PC Engine, SS, PS, PSP, and so on more than 10 game consoles. It comes with the professional TAS functions while taking the ease of use into account. That said, BizHawk not only can be used for game clearance video production with TAS, but also is friendly for casual gaming.