DOS Mounter 95 is a control panel for Mac OS 7 and up that eases the use of DOS/Windows disks with your Mac.  It lets you mount and also format drives, even Iomega Zip cartridges for PC usage.  One of the best features is it handles...

Read and import/export files from DOS-formatted drives

DockDisks is a simple control panel for Mac OS X that adds the mounted volumes onto the dock.

Dimmer is a Macintosh II screen dimmer.  As simple as a screensaver can get, only 12KB.  It has got hot corners (dim now and dim never) plus a dimming range.  

Default Folder is a Mac OS 9.2.2 and Mac OS X Classic savvy control panel that enhances Open and Save dialog boxes to make it easier for you to manage files on your Macintosh.  It provides many of the essential features of commercial utilities...

Dialog View is a control panel that allows you to change the appearance of directory dialogs (Open and Save dialogs).  You can control what kind of icons are used, increase the height and width of the file list, and set the font for the file...

Default Folder X is a Mac OS X System Enhancement that improves Open and Save dialogues.

DragAnyWindow 2.0 Moves those previously unmovable windows. Great for compact Macs.

Change monitor colour resolution on the fly by holding a key combo and clicking anywhere to bing up a menu, handy for those games that insisit on a specific screen colour depth.