WiiSCU by Wack0 (mod of IOS51+shop by tona) - powered by PatchMii. The application gives you the option to install new versions of channels and IOSes without touching the system menu.

CHANGELOG v0.25
===============
-Tidied up code (again)
-Added some colour
-Removed support for IOS16 and IOS60
-Added IOS58
-Removed support to patch the trucha bug into IOS61
-Fixed meta.xml at long last

Source/Download:WiiSCU - WiiBrew