WiiColEm is a port of the ColEm ColecoVision emulator developed by Marat Fayzullin.

Changes:

* Cartridge-specific overlays
* Default keypad (controller) image for cartridges without specific overlays
o Ability to set the default keypad (controller) size
* Ability to specify whether to use cartridge-specific overlays (global and per-cartridge).
* GX based scaler
o Ability to adjust screen size to any size/dimensions via the “Screen Size” option under “Display”. If this is entered after loading a cartridge, the last frame will be displayed to assist in sizing.
* USB support
* SDHC support
* Classic Controller Pro support
* Support for ColecoVision MegaCart(R)
* Fixed Lord of the Dungeon save/load state issues
* Fixed Opcode memory expansion save/load state issues
* Fixed save/load state bug causing the palette to not be restored correctly (Aquattack, War Room)
* Ability to set Wiimote orientation (sideways/upright) for navigating menus
* Firing in Aquattack is now supported via the right analog stick (GameCube, Classic/Pro controllers).
* Fixed bugs caused by pressing multiple keypad buttons simultaneously

http://wiibrew.org/wiki/WiiColEm