Bennu is a high level open source game development suite which focuses on modularity and portability, making it a perfect choice for cross-platform game development. Read more about Bennu goes Wii (Wii misc)
Wee Basic is a BASIC interpreter for the NDS got an update after more than half a year - programming and debugging are performed directly on the DS. Read more about Wee Basic v0.7 (NDS Application)
If you have ever played Mario Paint for the SNES, then you have probably played the Gnat Attack game (also known as Coffee Break). brunette_redhead's game is a spinoff of this, created for the Wii. Read more about Bugiin v1.0 (Wii Game)