Cakewalk is a MIDI music authoring and editing tool. The earlier versions are considered among the best MIDI tools that ever existed. Microsoft Windows. limited music notation and a built-in scripting language called CAL (Cakewalk Application Language). limited functionality OEM-bundled "Express" editions.

CalcStar is a spreadsheet from MicroPro, somewhat like VisiCalc but using commands similar to WordStar. You can also format content similar to WordStar. It was available for CP/M and DOS, and often part of early 80s system's bundled software.

Calendar Creator Plus from Vermont Creative Software/Power Up, and later Spinnaker Software, is a tool for creating printed calendars with different styles and custom lists of events.

Canoma was a 3D-modelling application for Windows and Macintosh. Released by MetaCreations Corp. in 1999,[2] this application allowed users to create 3D models based on one or more photographs taken from various angles. This process is known as photogrammetry. The user "pinned" the corners of wireframe primitives over real world shapes such as buildings, boxes, cylinders and other geometric shapes (it could not really handle organic shapes), the application then dynamically extrapolated the perspective, angles and shapes and produced a 3D realization, applying the textures from the photograph(s) onto the models.

Carbon Copy is a remote control desktop program for DOS and later Windows, similar to PCAnywhere. protection. You can not connect to other copies of Carbon Copy if the serial numbers are the same.

CashBIZ, from M-USA Business Systems, Inc, is a low-cost and low-feature accounting tool for small cash based businesses. It features modules for checks, billing, and receipts, and a number of pre-defined reports.

Catz, from PF Magic, Inc, is a fun program that places an animated cat on your desktop for you to play with.

cc:Mail, originally from Concentric Systems, Inc and later Lotus and IBM, is a desktop e-Mail system intended for small LANs. It relies on accessing a shared database file rather than client-sever methods.

Adaptec CD Creator, today sold by Roxio, was a popular a tool for mastering and burning CD images. It was targeted primarily at the home and office markets and often bundled with CD-Burner hardware. Some OEM versions were customized for specific drives. Adaptec also sold a similar, but different, program for Apple Macintosh computers under the name Toast.

Managing Your Business With the Lotus 1-2-3 Program is an on-disk training system that focuses on the practical application of analyzing your business's performance while using the Lotus 1-2-3 spreadsheet. It includes quizzes, exercises, and sample spreadsheet templates.

Released by Cdex in 1983, this is an interactive training program that will teach you how to use VisiCalc. Cdex also sold training programs for WordStar, SuperCalc, EasyWriter ||, The IBM Personal Computer, and The Apple //e Personal Computer. There were versions for both the IBM PC an Apple II.

Celebrity is a powerful word processing program that includes a Speller, Thesaurus, Forms System, Report Writer, Calculator, Calendar, and File Cabinet. It was advertised as a solution for novice users, however the command based interface makes it less than user friendly.

Cellular Automata Lab is a powerful commercial scientific mathematical program for working with and exploring Cellular Automata, a system where individual mathematical elements grow, spread, and die based on a set of rules (like the old BASIC "Life" programs). This software provides functionality to create custom sets of rules. Although it had some potential applications, this specific product is more of a novelty, similar to fractal generators. It was published by Autodesk during a period of experimental exploration in to new scientific applications.

Central Point Anti-Virus was a DOS-based antivirus program developed originally by an Israel company, CARMEL Software Engineering Ltd. as "Turbo Anti-Virus", and licensed by Central Point Software Inc. It was the basis for Microsoft's Anti-Virus for DOS and Windows (MSAV and MWAV). In 1994 it was acquired by Symantec Corporation and merged into Norton Antivirus.

A powerful and friendly backup utility from Central Point Software, that supports backing up to either floppy disks or tape drives. Central Point Backup features ease of use, speed, detailed backup history, and virus scanning. This product was more commonly found bundled as part of PC-Tools.

Chain of Command is a chart making program specifically geared towards creating hierarchical organization charts. It features a fully graphical DOS based user interface, clipart, resizable text, and support for laser printers.

Change Directory Plus is a small commercial utility distributed with Softdisk publishing's Big Blue Disk magazine. It indexes all folders on your hard drive, and permits you to change in to a deep subdirectory simply by specifying the final subdirectories name.

Chart-Master, originally introduced in 1981 by Decision Resources, Inc., was the first software that could produce presentation quality graphics with a plotter on a personal computer. Decision Resources also produced Sign-Master and Diagram-Master. They were acquired by Ashton-Tate in 1986. This program was also bundled in the Master Graphics Presentation Pack.

CheckIt, from TouchStone Software Corporation, is a diagnostic tool for generic PC/XT/AT compatible computers. It can perform tests on RAM, hard disks, video cards, floppy disks, motherboard resources, and I/O devices. It has an easy to use menu interface but can also run tests non-interactively. It was followed up by the product WINCheckit.

Checks & Balances, by California Digital Engineering, is a fast, powerful, and flexible home accounting package for the IBM PC. It Manages checking, savings, and credit accounts, and prints checks.

ChiWriter is a WYSIWYG scientific text editor for DOS. Created by Cay Horstmann in 1986, it was one of the first that could write mathematical formulas on common PC computers.

CircuitMaker, from MicroCode Engineering, is an easy-to-use schematic design and simulation tool. This product was discontinued in 2000 after being bought out by Altium, and is not related to the current software of a similar name.

Citrix MetaFrame is an add-on for Windows Terminal Server that provides Citrix ICA connectivity and additional management tools. Unlike WinFrame, this is not an entire OS.

Multiuser Link is a telecommunications program that Connects a PC running DOS or OS/2 to a Citrix Multiuser system via standard RS-232C serial directly or with a modem.

Clarion is an advanced user friendly 4GL DBMS and programming environment for DOS and Windows. It boasted the ability to greatly reduce application development time, featured highly integrated visual creation tools, and a powerful set of program functions.