| Company Name | Software Titles |
|---|---|
| CentOS | 2,037 |
| Canon | 241 |
| Corel | 222 |
| Citrix | 202 |
| Cisco | 119 |
| Computer Associates | 70 |
| CA | 59 |
| Cyberlink | 47 |
| CommVault Systems | 47 |
| Crestron Electronics | 45 |
| Caterpillar | 43 |
| Crystal Decisions | 39 |
| CNC Software | 32 |
| Cypress | 31 |
| Creative Technology | 30 |
| CheckPoint | 29 |
| Chief Architect | 24 |
| Capita Software Services | 24 |
| CambridgeSoft | 21 |
| Creative | 20 |
| CCH Tax and Accounting. A WoltersKluwer Company | 20 |
| Cosmi | 19 |
| Captaris | 15 |
| Conexant | 15 |
| Cisco Systems, Inc. | 13 |
| CCC Information Services | 13 |
| CCH | 12 |
| Computer Sciences | 12 |
| Cognos | 12 |
| Compellent | 12 |
| ComponentOne | 12 |
| CoffeeCup | 10 |
| Compuware | 10 |
| CirrusLogic | 10 |
| Cengage | 10 |
| Contributors | 9 |
| Crawler | 9 |
| Colin Watson | 9 |
| Cadence Design Systems | 8 |
| Client Version | 8 |
| Cigati Solutions | 7 |
| Colasoft | 7 |
| CollabNet | 7 |
| COMODO | 7 |
| Chicony | 7 |
| Clipsal Integrated Systems | 6 |
| Contex | 6 |
| Comcast | 6 |
| Chapura | 6 |
| ChessBase | 6 |