DeskPicture 10.02 (by Peirce Software)
Well, MacOS X certainly lets you place a single picture on your desktop.

AppSizer 2.21 (by Peirce Software)
AppSizer is a control panel that allows you to modify an application's memory partition size as you launch it.

ShareDraw 2.02 (by Peirce Software)
ShareDraw is a full featured drawing application for the Macintosh.

Smoothie 1.1.3 (by Peirce Software)
Smoothie removes the jagged edges from pictures produced in your drawing and presentation applications using true subpixel anti-aliasing for superior results.

DeskPicture 10.02 (by Peirce Software)
Well, MacOS X certainly lets you place a single picture on your desktop.

Desktop Swap Pro 1.1 (by KKT Software)
Desktop Swap Pro allows you to change the desktop picture on up to two monitors at a preset interval.

Change Desktop 2.5.2.1 (by Brian Bergstrand)
Change Desktop is another application that will change your Desktop picture.

DeskFun 0.5.3 (by furrysoft)
DeskFun allows you to personalize your desktop beyond a simple background picture.

PandoFrame 3.1.3 (by Panda Systems)
PandoFrame allows you to place picture frames on your desktop.

Hour World Live Deskpicture 1.2.2 (by Paul Software Engineering)
HourWorld Live Deskpicture places a dynmaic image of the earth rotating as the day goes by.

ClickPix 1.1 (by Avis Nocturna Software)
ClickPix - Create professional desktop pictures in just a few seconds.

HourWorld Live Deskpicture X 3.0b20 (by Paul Software Engineering)
HourWorld Live Deskpicture places a dynmaic image of the earth rotating as the day goes by.

SwapTop 2.1.1 (by Dair Grant)
SwapTop allows you to set up a schedule to automatically download a random desktop picture each day, to download a featured daily picture,and to search the WebShots image archive.

SaveAsHTML 1.0.1 (by Artman21 Inc.)
SaveAsHTML is an AppleScript macro for Jedit4.

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.