If your wii is boot2 vulnerable then no need to install SNEEK because BootMii as boot2 is the best anti-brick protection.
WiiMC, it is a multimedia app so that you can play Movies, view pics, and play songs.
DML, you can play GC games of the SD card.
USB Loader (CFG Loader, WiiFlow, USB Loader GX), you can play games of the USB using the following USB loaders I listed.
ModMii, you can do almost everything there, softmod, download ios, update your softmod, download apps, SNEEK setup and many more.
WiiBackupManager, manage your Wii backups
Neogamma (only works if your Wii was released before the Black Wiis), play games of DVD