FBZX Wii is a ZX Spectrum emulator.
The project is based on FBZX originally written by Sergio Costas (http://www.rastersoft.com/fbzx.html). The code has been ported to Wii and largely improved with many new features by Oibaf.
FBZX Wii can be found on google code at fbzx-wii.googlecode.com
The program uses SDL Wii library.