Based on YAWMM which itself is based on WAD Manager, modded up by various people.
Changes from the last YAWMM googlecode version:
-updated to be compiled in the latest devkitppc, libogc versions
-added on-the-fly IOS patches when AHBPROT is disabled, so no cIOS is required in those cases
-support for classic controller, wiiu pro controller (on both wii and vwii) and wiiu gamepad (in wii vc mode)
-small corrections in how the root path is selected (having no "wad" folder now correctly displays on device root)
For more info on YAWMM itself, check its original readme.