BizHawk is a multi-system emulator written in C#
Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc
Emulator of the ancient 8 bit microprocessor SC/MP 2
Super Nintendo (SNES) emulator focused on performance, features
Third-party TI-84 Plus CE / TI-83 Premium CE emulator
FreeChaF is a Fairchild ChannelF libretro core
Customized C# Intel 8080 emulator
Modular, agent-oriented and extendable agent toolkit.