specializemii and rgbpat2 are pretty cool!! [i use 3ds, not sure if theyre on wiiu]

the homebrew launcher

not a app but wii u plugin: Givemeyoutube. it does what it says, it gives you youtube

@Rgt I installed this plugin and the YouTube package that was on NUSspli but it didn't seem to work

that version is an old version, you need to get the latest one.