StartupSound.prefPane 1.1b (by Arcana Research)
StartupSound.

StartupSound.prefPane 1.1b (by Arcana Research)
StartupSound.

Sound Volume 2.1 (by heagy.com)
Sound Volume - Easily change the sound volume from the Dashboard.

Correct sound balance 1.0 (by DJ Gamble Software)
Sound balance is a quick fix to a lesser known bug in OS X where changing the system volume rapidly using the keyboard controls causes the system's sound balance to shift randomly.

Startup Player 2.1 (by Alessandro Levi Montalcini)
Startup Player is a definitely cool control panel that plays a sound over and over during the startup process, until all other extensions and control panels have loaded and the Finder comes out.

QuickSwitch 1.0 (by a&M STUDIO)
QuickSwitch, through the startup disk of system environment settings, the starter system (CD and DVD) is application in order to modify setting.

Sound Set Scripts 1.0 (by Craig Sylvern)
Sound Set Scripts are a pair of AppleScripts that choose a new Sound Set on startup and turn Sound Sets off.

VolumeKnob 1.1 (by Infamus Software)
VolumeKnob is a Macintosh utility that allows you to easily raise and lower your system volume directly from the keyboard.

Volume Dockling 2.0.0 (by On-Core, Inc.)
Add Volume Dockling to your dock and be able to control the system volume easily.

StartupFrills 3.6 (by Ian McCall)
StartupFrills is a utility which livens up the process of switching on your Mac.

Startup Chime Stopper 1.10 (by AlphaOmega Software)
Startup Chime Stopper allows you to remove the irritating chime of your Macintosh at startup.

LoginHelper 3.1 (by Kewl Beans Software)

You Control 1.4.2 (by You Software)
You Control is a flexible menu utility that allows users to put commonly used items, including files and folders, at your fingertips.

Indigo 2.0 (by Perceptive Automation, LLC.)
Indigo is a home control server that integrates X10 hardware devices.

Tiger Cache Cleaner 3.2.4 (by Northern Softworks)
Panther Cache Cleaner is a utility designed to provide easy access to numerous OS X maintenance and utility options.

DesktopSweeper 1.0 (by Philippe Martin)
DesktopSweeper is a freeware APE Module (the equivalent of Unsanity's Haxies) that provides a hotkey to control whether or not Desktop icons are displayed.