Using GL2GX will enable you to do easy porting of OpenGL application to the Wii and/or Gamecube. Currently there is only an first alpha version released.

http://www.wiibrew.org/wiki/Development_Applications/gl2gx

libwiisprite is a C++ sprite library written for the Wii which utilises GX for all it’s graphical operations, meaning the GPU is used to accelerate graphics.

libwiisprite aims to make developing Wii homebrew simple and fun with better graphical results than currently existing libraries.

libwiisprite is currently under heavy development, but this version is a semi-stable version allowing most of the proposed functionality of the library.

Currently 24bit and 32bit PNGs are the only supported image format. We are working on allowing images to be loaded from compiled-in texture data and even more formats.

The library comes with full Doxygen documentation to help get development started. It is also available online: http://feesh.braingravy.co.uk/libwiisprite/

Changes:

Sprites now also can use additional collision detection which includes the rotation and the zoom of the sprite. Check the documentation on how to do it.
Implemented additive blending which can be useful for particle effects. Check the transformation enum in sprites.
Fixed a bug with transformations. Now Sprite accepts u8, so transformations can be used as flags.
Added defines for IR pointer correction. Check spritetest on how to use the pointer the right way.
Several additions to GameWindow: You can now stop the Video subsystem, as well as poll for the height and width of the screen.
You can now use Image to draw on the image. You must derive from the image to an own class to use it.
Images can now only initialized only once. This prevents from freaking Sprites and TiledLayers out when changing images.
Some optimizations here and there.

http://www.wiibrew.org/wiki/Development_Applications/libwiisprite

GRRLIB is a GX RGB Renderer Library with lots of nice functions for less expirienced coders.

The support for older versions of GRRLIB has been dropped.

http://www.wiibrew.org/wiki/Development_Applications/GRRLIB

A simple text-based demonstration of the Les Paul Guitar Hero 3 controller (and presumably Guitar Hero: Aerosmith controller). Requires the Guitar Hero controller to be hooked into your wiimote.Hold down the fret buttons and strum the guitar. Home button on the Wiimote exits to loader.

http://www.wiibrew.org/wiki/Homebrew_apps/GuitarDemo

WebRator is a fun application for Wii.

Just point your browser @ your Wii’s ip, the rest is obvious. For more long distance fun get someone else to dial in to it. Supports up to 4 wiimotes, no wiimote attachments are recommended, the wiimote jacket may be used for more comfort.

http://www.wiibrew.org/wiki/Homebrew_apps/WebRator

Wiihttpd is a simple multi-threaded HTTP Webserver for the Wii. Wiihttpd is built on the ftpii source code.

How to use:
Create a /www directory on the root of your SD card and place any files you would like to be served in there. Run the included ELF with your favourite method to boot homebrew.

http://www.wiibrew.org/wiki/Homebrew_apps/Wiihttpd

bmic has picked up dlkj’s work and improved Sudoku for Wii. Figure out the correct placement of all the numbers!

The puzzle is controlled by moving an on screen cursor. The cursor will wraparound the edges of the puzzle if you try to move past the edge.

The value under the cursor is incremented/decremented to the desired value. Value ‘0’ is shown as a blank cell. Values are wraparound from 0 to 9 as well.

If desired, the user may mark a cell as ‘uncertain’ by pressing the ‘A’ button. This can be toggled off if desired via the same button. ‘uncertain’ cells are marked with a gray background.

The game will check for any incorrect cells (i.e. duplicate numbers in any row, column or 3×3 cell). Any incorrect cells will be highlighted with a red tint.

http://www.wiibrew.org/wiki/Homebrew_apps/Sudoku2

The Twilight Hack is currently the only safe, public way to enable homebrew on an unmodded Wii. The Twilight Hack is achieved by playing a hacked game save for The Legend of Zelda: Twilight Princess which executes a homebrew application from an external SD card.

The latest release is compatible with version 3.3 of the Wii System Menu.

http://www.wiibrew.org/wiki/Twilight_Hack

Forgotten Linkz has updated his Rock Paper Scissors game for Wii.

Changes:

Made 2 player mode
Extra images
Rumble!

http://wiibrew.org/wiki/Homebrew_apps/Another_Rock_Paper_Scissors

Snake for Wii is a Wii homebrew version of the game Snake.

Changes:

Added Twoplayer Mode
Added Sound (again)
Added Menu

http://wiibrew.org/wiki/Homebrew_apps/Snake