Deck is among the earliest pieces of non-linear digital audio editing workstation software available for the Mac. It can be used to edit and arrange regions of audio on multiple tracks and control fades and volume and pan automation.

Dancer is a 12 frames B&W animation inside a small vertical desk accessory window.  The Dancer animation plays in a loop constantly.  Nothing else to say about Dancer :P

Digital Performer is an integrated digital audio and MIDI sequencing production system. It provides a comprehensive environment for editing, arranging, mixing, processing and mastering multitrack audio projects for a wide variety of...

Helix is a pioneering database management system for the Apple Macintosh platform, created in 1983. Helix uses a graphical "programming language" to add logic to its applications, allowing non-programmers to construct sophisticated...

Free antivirus for old Macs, retired in 1998. Some Mac users, a minority, who do not use Microsoft Word 6 or Excel 5 or later versions, may still find Disinfectant useful.  

Designer's Studio (a.k.a. D' Studio in short) is an awesome, and altough unofficial, very complete Kaleidoscope scheme maker/editor.  As a shareware, D' Studio was the very first Kaleidoscope scheme editor to even appear on the...

Disk Copy was Apple's disk image creation and mounting tool that shipped with Mac OS starting from 1988 (System 6) up to 2002 (OSX 10.2).  The last version released is beta but works fine, especially that it could mount and allow editing of...

Archived partial copy of files that were available on the ftp server at developer.apple.com, this contains SDK, developer tools and sample code files for developing for PowerPC classic Mac OS as well as very early versions of Mac OS X. The...

DiskTracker is a very complete disk cataloging system for Macintosh.  It allows one to drag and drop a CD, a hard disk or any other kind of volume onto it and automatically create the disk files/folders hierarchy catalog, complete with the...