This tool will allow you to make a multiboot disc for GameCube games. You can also load the the multiboot iso using GC Backup Launcher v0.2.
Download Link:Here.

You must be wondering what this is. IT IS ONE OF THE BEST THINGS YOU CAN HAVE IF YOU USE A USB HARD DRIVE OR FLASH DRIVE. It can make channels for your Wii game. All you have to do is select the iso you want a channel for-if you don't have an iso don't fret, there is a WBFS option too , then choose where you want to boot it from (USB/SD), choose language and video region, and a whole lot of other options too. REMEMBER: This makes all wads with the same Title ID, so you might want to use WADder to change the Title ID of the wad.
Download Link:Here.

This is the best download manager software you can use. All you have to do is copy the links and then make it start the download and thats it, you just have to sit back and wait, and let it do the downloading for you. There are two versions, one which you install and the other one is a portable version.
Install version Download link:Here. Portable version Download Link:Here.

A Simple, east to use to use IOS Patcher tool. It allows you to patch your iso to play on a specific IOS. All you need to do is drag the iso to the .exe and it will give you a screen like the one above and all you have to do is type the IOS name.
Download link:Here.

This software is an easy to use injector tool that can inject a rom into a wad. It can also inject a .dol file,or convert dol to wad.
1. It is very straight forward,easy to use... just select what type of rom you want to inject (or choose DOL if you want to inject a .dol file)
2. Select a wad file
3. Then make a new name for the channel
4. Press Inject! and that it, you just injected a rom (or .dol file) into a wad
Download Link:Here.

This very useful application can split and join files together. If a file is too big to upload, you can split it with hjsplit into smaller files to upload them and then join them back together with hjsplit by giving someone esle this program.
Download Link:Here.

This software application is an NFO reader. There are times when you might try to read NFO files and it will say corrupted messages, but after you install GetDiz it allow you to read NFO files that will come up with an ISO and other files.

Download Link:Here.

This software can patch the video to PAL-NTSC or NTSC-PAL. It also removes the 002 and 001 error codes. It is very easy to use and can do a lot of useful things. You will also need WiiScrubber and then extract the main.dol in the game partion.
Download Link:Here.

This software manages your codes for Gecko OS. You can make GCT files which are the files for Gecko OS. You use it by getting a txt file full of codes. You can also update your GCT file using the Export to GCT option.
Download Link:Here.

This WBFS manager has a nice GUI. It also supports CISO games and allows you to convert CISO to ISO and vise versa.
It also allows you to rip games from your DVD-ROM (Wii game) to your hard drive. Download Link: Here.

This allows you to make a BootMii ini file. You can also make it autobbot to HBC or SM. You can also use different video modes (NTSC, PAL50, PAL60, and PROGRESSIVE)
There is a : 32bit (x86)version. Download Link: Here.   BootMii Config Editor Forwarder & Channel version. Download Link: Here.

This another WBFS-Manager like tool. It has a user-friendly GUI and I think it has the best GUI out of all WBFS tools/managers. This is equal to English WBFS Intelligent. It supporst CISOs also which is great. The thing you have to remember is that you better go to the config option and select increased drive detection otherwise USB Drives and SD cards won't be detected. Creds to jjulianx who said put a link in the Wii Faq's Forum. NOTE: If you want this skin then you have to go to view and select "Skin Mode" and "Extended View".
Download Link:Here.