| Company Name | Software Titles |
|---|---|
| Cummins | 6 |
| Calyx Software | 5 |
| CapaSystems A-S | 5 |
| CT Summation | 5 |
| Canary Labs | 5 |
| COWON | 5 |
| CubexSoft Technologies | 5 |
| ComputerAssociates | 5 |
| Canopus | 5 |
| Chikka Asia | 4 |
| Centrify | 4 |
| CompanionLink | 4 |
| Camera Maker | 4 |
| company | 4 |
| Creative Home | 4 |
| Cognex | 4 |
| Cogniview | 4 |
| Clarity Systems | 4 |
| Caligari | 4 |
| CodeSmith Tools | 4 |
| Cognos Incorporated | 4 |
| Citect | 4 |
| Citeknet | 4 |
| CS Odessa | 4 |
| Coremetrics | 4 |
| Colin Harrison | 4 |
| ChoicePoint | 4 |
| CASIO | 4 |
| Compliance Systems | 4 |
| Camtech | 4 |
| Computer | 4 |
| Cypherix | 4 |
| ContMedia | 4 |
| ConeXware | 4 |
| Cmotech | 4 |
| CareerTrack | 4 |
| ClickView | 4 |
| CooolSoft | 3 |
| CodeGear | 3 |
| Cjwdev | 3 |
| Companion | 3 |
| CUNA Mutual Group | 3 |
| Configuresoft | 3 |
| Chilkat Software | 3 |
| Calabrio | 3 |
| CounterPath | 3 |
| CCH Canadian Limited | 3 |
| Comptroller of the Currency | 3 |
| Codeplex | 3 |
| CNet Media | 3 |