FBZX is a ZX Spectrum emulator for FrameBuffer written by Sergio Costasand ported as FBZX Wii to Wii by Oibaf.

Main features:

* Emulates accurately the Original 48Kspectrum (both issue 2 and issue 3), the classic 128K, the Amstrad Plus 2, the Amstrad Plus 2A and the Spanish 128K. This includes screen, keyboard and sound (both speaker and AY-3-8912 chip).
* Screen emulation is extremely accurate, so it can emulate border effects and even attribute effects.
* Supports Z80 snapshots, both loading and saving, and loading .SNA snapshots.
* Supports TAP (both read and write) and TZX (only read) tape files, supporting normal speed loading and fast speed loading.
* Emulates up to 2 joysticks of types: kempston, cursor and sinclair1 and sinclair2.
* All the wiimote, nunchuck and classic controller buttons and joypads are fully configurable.
* Virtual keyboard support.
* Emulates the Interface I and Microdrive.
* Emulates the ULAPlus
* Based in a new, fully free, Z80 emulator (Z80Free).

Changes:

* In Joypad mode, the nunchuck works now
* New code for Y-3-8912 emulation
* Fixed RETN and RETI Z80 instructions
* Fixed Flag emulation for many Z80 opcodes: Speedlock loader works now. Only the Flag in Bit n, (HL) is not correctly emulated.

http://wiibrew.org/wiki/FBZX_Wii