CopyWrite is a disk duplicator that can duplicate disks with many advanced copy protection schemes using a standard IBM PC floppy drive and controller.

Corel Office is a software bundle that includes WordPerfect and a number of other office applications. It competed unsuccessfully against Microsoft Office. This bundle started out as "Borland Office", was briefly known as "Novell PerfectOffice", then "Corel Office", and under Corel it later became "WordPerfect Office". (Not to be confused with the unrelated ~1990 groupware program, also called "WordPerfect Office")

Corel Photo Paint is a bit-mapped graphics editor optimized for photo manipulation. It competed against Adobe Photoshop and Paint Shop Pro, and was often a companion product to the vector based CorelDRAW. It includes a large number of special effects, a color management system, brushes, layers, and scanner support.

Corel Presentations (which is often referred to simply as Presentations) is a presentation program akin to Microsoft PowerPoint and OpenOffice.org Impress.

A printing program for creating over 20 types of printing projects including cards, banners, signs, certificates, calendars, brochures, business forms, labels, membership cards, coupons, tickets, bookmarks, and doorknob hangers. It uses the 32-bit CorelDRAW 6 mini-engine.

Corel Draw is a vector based drawing and illustration program. It is primarily a Windows application, but was ported to Mac OS, Mac OS X, Linux, CTOS and OS/2. It competed against Aldus Freehand, Adobe Illustrator, and Micrografx Designer.

Corporate Ladder is a quick and easy text-mode DOS based tool for creating organization charts and similar documents such as process-flow diagrams, decision trees, procedure diagrams, forms, and labels.

EZ Legal Software Corporate Secretary is a set of legal templates geared towards the operation and management of a company.

Correct Grammar is a grammar checking and analysis tool for DOS. Correct Grammar incorporates technology from the Houghton Mifflin CorrectText system.

Correct Quotes, from WordStar International, is a small database of about 5000 famous quotes. There were versions for DOS, Windows, and Macintosh. WordStar International, the producers of WordStar, also sold several other similar companion products including Correct Writing - a writing style manual, and Correct Letters - a large collection of letter templates.

CorrectStar, from MicroPro International, is an add-on spell checker for WordStar 3.3. It was sold both bundled with WordStar and separately. Later versions of WordStar integrated the spell checker.

Cougar Mountain Software ACT 2 PLUS is a comprehensive multi-user accounting package. It includes General ledger, accounts receivable and payable, purchase order, order entry, inventory and payroll, check reconciliation. It also features the ability to import and export files, and a modular form set-up allows integration of all modules. It was sold alongside ACT 1 PLUS, the single user version.

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.

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.

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.