| Company Name | Software Titles |
|---|---|
| CUDL | 1 |
| CUES | 1 |
| Cultured Code | 1 |
| Cummins | 6 |
| CUNA | 1 |
| CUNA Mutual Group | 3 |
| Curitel | 1 |
| Custom | 1 |
| Custom Computer Services | 2 |
| CustomGuide | 1 |
| CVISION Technologies | 2 |
| CVR | 2 |
| CVSGUI | 1 |
| CVSNT | 1 |
| CWAV | 1 |
| CWI | 1 |
| CWORKS SYSTEMS BERHAD | 3 |
| Cybage Software Pvt | 2 |
| Cybelsoft | 3 |
| Cyber Power Systems | 1 |
| Cyber Sport Software | 1 |
| CyberArk | 1 |
| CyberDefender | 2 |
| Cyberguard | 1 |
| Cyberlink | 47 |
| Cyberlogic Technologies | 2 |
| Cybernet Software Systems | 1 |
| Cyberspace Headquarters | 1 |
| CyclingPeaks | 2 |
| Cyco | 1 |
| Cycos AG | 1 |
| Cyence | 1 |
| CynCast | 1 |
| cYo Soft | 1 |
| Cypherix | 4 |
| Cypherpunks CA | 2 |
| Cypress | 31 |
| Cyser Software | 1 |
| CYSTEP AG | 2 |
| CZ Solution | 1 |
| D-Link | 21 |
| D-MAX | 1 |
| D.S.M.-Interdesigner Software Development | 1 |
| D:\SETUP.EXE | 1 |
| Dacris Software | 2 |
| Dade Behring | 1 |
| DAEMON'S HOME | 1 |
| Daikin | 1 |
| DaimlerChrysler | 1 |
| DAISY Consortium | 1 |