Dolphin is a Gamecube emulator. It also has preliminary support for Wii and basic Triforce emulation (this is pending a commit, and does not run games yet).

NO $ Zoomer is a utility that piggybacks on NO $ GBA, GBA and NDS emulator. It adds features that are not supported by NO $ GBA. Thus, in the display settings, you can enlarge the screen and even to full screen.