SMSPlus is a Sega Master System/Game Gear emulator. This is a port of SMS Plus created by Charles Mac Donald.

Changelog:

14/12/2008

[NGC/Wii]
added Blargg’s NTSC Filter support (NTSC video artifacts emulation)
added an option to enable/disable bilinear filtering
removed embedded font, (re)enabled IPL font support: now should works for Qoob users too (thanks to emukiddid)
patched libfat for faster SDCARD accesses (thanks to svpe)
SaveState filenames are now based on the ROM filename (for FAT devices only)
various bugfixes, menu tweaks and code cleanup

[NGC only]
added 480p support in menu

[Wii only]
implemented fast scrolling in menu using Wiimote D-PAD
added “Power” button support
added USB Storage support
Widescreen menu fix
*new* libogc 1.7.0 features: SDHC support, Wiimote shutdown button support

http://wiibrew.org/wiki/SMSPlus