basicaly the only thing for the end user is
VC injection
Some early game mods like music replacement and nsmbu level editor and little else.
GC to vpad Fix94 app taht allows you to use your wiiu gc adapter to play games that you would use the gamepad for(example playing mk8 with the gc controller is preety dope).
Spoofer that lets you be on 5.3.2 but play online and download game updates and manualy install them.
everything else is really not a end user thing.