Super Sawndz is a new GUI for Sawndz by Jaklub. New features include
Browse wav ids
Preview sounds
Select a .brsar file from anywhere to edit
Shows file size of sounds and groups. Turns red to notify you if the size is over 0xDDDDD

It also supports inserting and creating sawnd files.
To insert .wav files you'll need to have sndconv.exe/dsptool.dll/soundfile.dll

Thread:
http://forums.kc-mm.com/index.php?topic=47713.0

Source Code:
http://code.google.com/p/super-sawndz/source/checkout

A windows program I made to help organize hacks with Riivolution. This organizes the commonly replaced files under a simple view, showing you the portraits of characters or listing all the music by the stage it's used on.
It also lists every file under the All Files tab, giving you access to every file and folder.
If you have a common5.pac file, this will let you swap CSPs/SSPs/SSIs and SSTs using the same brawllib powered interface as BrawlBox.
(C# source is included)
If you're a PAL user, replace brawlFileSystem.xml with brawlFileSystem_PAL.xml