Crayola Art Studio, from Micrografx, is a heavily lobotomized graphics packaged aimed at kids. It features a Bob-like "room" menu, animated characters, sound effects, a paint program that can place shapes and clipart, and several other printing programs. It is similar to, and competed against Microsoft Fine Artist.

Cricket Graph, from Cricket Software and later Computer Associates, was a best selling presentation graphics program, and a companion product to CA-Cricket Presents (formerly Xerox Presents). This program can create a variety of graphs, such as line, bar and pie charts. CA-Cricket Presents can then import the graphs in to presentations.

Originally released in 1982, Crosstalk XVI, from Digital Communications Associates Inc of Alpharetta, Georgia, is a powerful telecommunications program for the IBM PC with many scripting features. "XVI" means "16", and refers to the powerful new 16-bit x86 CPUs found in IBM PC's and compatibles. It was followed up by the MK 4 and Communicatior products.

Cubasis is an entry-level music sequencer and notation program for the Apple Macintosh. It features quantization, music printing, and QuickTime integration.

The ultimate DOS tutor. Everything you wanted to know about DOS and more.

DaVinci eMail, from Da Vinci Systems, is a reliable e-mail program that integrates with Novell Netware MHS and GMHS mail system backends. There were versions for Windows, DOS, and OS/2. Earlier versions ran under Windows 2.

DAC-Easy Word is a budget word processor package. It can have up to four document windows open, can work with large-ish documents, supports macros, features drop-down menus, built-in help, and includes a mailing list manager.

DacEasy was the first company to offer affordable accounting software geared towards the small business. It was first released in 1985 and had gone through many DOS revisions at the time the Windows version was released.

Dan Bricklin's "Demo" is a tool for creating tutorials, interactive application demonstrations, and interface prototypes. It has a powerful scripting system, with the ability to store and manipulate both text and graphics screens, and a redistributable runtime. author of VisiCalc. Demo was first released in 1985 by Dan Bricklin's consulting firm Software Garden. It was later sold under Peter Norton Computing, and then Sage Software.

DanCAD is a tool for producing technical line drawings and animations. It is designed for mechanical engineers to analyze and simulate 3d mechanisms, such as complex compound robotics motions. mathematical functions, animation, and PostScript printing.

Dashboard for Windows, originally from HP, is a convenient push-button utility which gives you quick access to and maximum control over your Windows programs. and buttons for launching programs. Drag-and-drop support for printing, plotting, and faxing. Miniature screens that make it easy to work with several full-screen programs at once. An alarm clock with a built-in snooze alarm. And "At a glance" feedback to let you know which programs are running and how much memory you are using. It has a resemblance to the Unix Common Desktop Environment toolbar.

DataEase, from DataEase International Inc., USA., is a fast, easy to use yet powerful, menu-driven relational database development system for the IBM PC. Not copy protected. It featured an all-in-one database, development environment, form designer, reporting, and programming language. Its main strength was as an application develoipment environment that required minimal programming and automated/integrated many implementation and maintenance tasks. There was also a sort-of Unix version "DataEase XDOS". Initially, it competed with dBase, Condor, and R:Base.

PowerQuest DataKeeper 3.0, formerly from HighPoint Technologies, is a powerful real-time backup program. It features the ability to continuously monitor backups, works with any removable media, compression, and registry protection.

DataPerfect, originally written by Lew Bastian, published through WordPerfect Corp, and later through Novell, was a fast, memory efficient, but capable relational database for DOS. WordPerfect Corp sold the product alongside their other DOS based office products, such as WordPerfect and PlanPerfect. In 1995 Novel released DataPerfect as freeware and development was continued by its original author until about 2008.

DB Graphics, from the makers of R:Base, is a professional graphing and analysis program that features native integrated support for accessing information stored in R:Base and dBase databases. Much in the same way that spreadsheet graphing programs can work with live data in a spreadsheet, DB Graphics can work directly with data in a database. It can select, sort, perform mathematical calculations, and format strings, without extracting data to an intermediate file.

DB Master is a powerful and flexible database for early personal computers. It was produced by Stoneware Inc., and in 1986 it switched ownership to Macon Software Inc.

Ashton-Tate dBase was an early popular database management system for CP/M and MS-DOS. It was regarded as one of the killer applications for CP/M, and achieved good success. At the time of conception Ashton-Tate was a garage based company but quickly grew.

dBase Mac, originally developed by a small company named DigiCorp and then marketed by Ashton-Tate under the dBase name, was a unique and powerful database program for the Macintosh. It featured a sophisticated graphical user interface, a procedural programming language, and the ability to access data from other databases and spreadsheets. 1.00 was released in 1987.

Decision Pad, from Apian Software, is a decision support tool that uses a decision matrix approach. It also supports a three-dimensional decision matrix for group decisions, and can import/export data from Lotus 1-2-3 files. It competed against a similar tool called "Prism".

DECTalk was a text to speech system used in automated telephone, radio, and TV systems. It was notably used as an artificial voice by Stephen Hawking. Most DECTalk devices were standalone serial devices, however DEC did produce an ISA expansion card for the IBM PC that contained this functionality. This software is required to operate these ISA cards.

Back before MapQuest or Google Maps, people could own an entire USA road map on a CD-ROM. DeLorme Street Atlas was one of the most popular road mapping products. You can search for street names or by phone number and zoom in on local neighborhoods. enabled users to create customized maps. focused on road maps. Later it competed with Microsoft Expedia Streets and Rand-McNally Route Planner.

DeltaGraph, originally from DeltaPoint and later SSPS, was a powerful business and scientific statistical graphics package for the Apple Macintosh and Microsoft Windows. graphics-only packages like Excel.

DeluxePaint II is a bitmap pixel graphics editor that was extremely popular on the Amiga platform and used by many developers to produce video game graphics. It was ported to DOS and the Atari ST.

DeluxePaint Animation is a raster based animation program based on the DeluxePaint painting program. It features ease of use, powerful drawing functionality, and a playback utility. As a DOS program, it was limited to 640k and 320x200 resolution in 256 colors.

Deneba Canvas is a shape based drawing and illustration program for the PC and mac. Unlike other publishing programs of the time, Canvas combined the ability to use vector graphics and raster images. It could also function as a word processor.