UAE is a famous Amiga emulator ported to the Wii. UAE Wii can be found on googlecode at uae-wii.googlecode.com, and is based on the source code of E-UAE. The port uses SDL Wii.
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FMyLife.com Reader for the Wii Console!
Rokoban is a Sokoban port for the Wii by Zalo. The game is about pushing boxes. The game has got 3d graphics and was a part of TehSkeen.com's Wii Coding Competition.
BrawlStats is a Wii application that will have to be run after a Super Smash Bros. Brawl session. It will store automatically on your SD your results and then you will be able to navigate freely through a clean GUI that will show you a lot of information that Brawl doesn't store (or doesn't show). It can be like a database of your Brawl matches.
OpenBOR (Open Beats of Rage) is an open source engine to play Beats of Rage.
GeckoReader is a program to be run under Windows that will open a command prompt and output what it reads from a USB gecko. You must have the USB gecko installed, set up the COM drivers, and have .NET 2.0 for this to work properly. Then whatever buffer is sent from the Wii/Gamecube should pop up on the screen.
WiiRadio is a SHOUTcast stream player. It can read from thousands of Internet radio streams and play them back on the Wii.
MegaCodeDownloader is a cheat code downloader for the Wii. The project is currently being maintained by tpw_rules but was previously maintained by Megazig.
c64-network.org (Frodo based) is a Commodore 64 emulator written by Christian Bauer. It was ported to the Wii by Simon Kagstrom, and many C64 games are fully playable on the Wii with it. So go ahead and beat your friends in International Karate, Boulder Dash or Bomb Jack. This version is not the same as Troy Davis implementation, but Troys work is available in a branch in the subversion tree.
It's Yahtzee for the Wii coded by Chris.