OpenDivX is a DivX video codec for QuickTime on PPC Macs.  

Register all QT v7x as Pro version: name: Pablo/nop code: SMH2-6F4K-8SK9-ST5W-QKU3 

G3Strip is a Control Strip Module to control the PowerPC750's back-side cache and display a range of CPU information. kykz's Software. (1999). READ ME. Electronic Document.

To suppress custom icons on CD-ROMs install this extension. This tends to speed up the Finder by a factor of about a zillion. To temporarily show the custom icons, hold down the Command (⌘) key when opening a folder. Suppose you want the...

Speeds up disk-related activities on the Macintosh Centris 660AV and the Macintosh Quadra 660AV and 840AV.

Very Safe Mail is a System extension that places an additional menu on your Macintosh menu bar. The menu commands can be used with almost all e-mail applications, including Claris Emailer, Eudora, and Netscape Navigator, to encrypt (or decrypt) both...

ColorKey is a control panel that allows you to instantaneously switch/cycle through chosen color depths when you hold down Command (Apple) and Option (ALT) while you click the mouse.  To edit the cycle options, hold down Command (Apple), Option...

Allows applications to utilize drag-and-drop for improved UX. Included in System 7.5 and beyond, these files let you utilize the feature on earlier versions of System 7.

Open Spaces is an extension I wrote because I was annoyed that I could move through folders with the arrow keys in System 7, but needed two hands to open a file (I don't have an extended keyboard, so neither command-O nor command-down-arrow is...

WMA Audio codec extension which allows QuickTime Player to play WMA files.

Drop this in your System Folder (or Extensions folder under System 7) so that the Finder under Systems 6/7 (and probably, I think, back much farther than that) will show files modified today or yesterday as “Today” or...

Black Box is an INIT that you place in your System Folder which adds several system enhancements. An enhanced analog or digital clock, task strip, a stars screen saver, screen capture and printing any portion of the screen, Finder effects and...

Changes your cursor for a bondi blue cursor. Looks to have been made using parts of CursorAnimator 2.0.1  

SCSI Accelerator is a patch to the Mac's SCSI-dispatch code: the author reports that it substantially increases hard-disk throughput (especially if the disk is subsequently reformatted with a lower Interleaving ratio). Unknown Author....