| Concrete CMS | 1 | 1 |
| Concrete5 | 2 | 5 |
| Concrete5-legacy Project | 1 | 5 |
| Concretecms | 1 | 74 |
| Concurrent Versions Software Project | 1 | 1 |
| Concursive | 3 | 0 |
| Conda | 1 | 1 |
| Condor | 1 | 18 |
| Condor Project | 1 | 13 |
| Conectiva | 1 | 2584 |
| Conexant | 1 | 1 |
| Conexware | 2 | 6 |
| Conf-cfg-ini Project | 1 | 1 |
| Config-handler Project | 1 | 1 |
| Config-model Project | 1 | 2 |
| Configobj Project | 1 | 1 |
| Configserver | 1 | 1 |
| Confinit Project | 1 | 1 |
| Confire Project | 1 | 1 |
| Confirm | 1 | 1 |
| Confluent | 2 | 46 |
| Conftool | 1 | 1 |
| Conga | 1 | 7 |
| Conkurent | 1 | 4 |
| Conky | 1 | 1 |
| Connect-multiparty Project | 1 | 1 |
| Connect-pg-simple Project | 1 | 1 |
| Connect2id | 1 | 4 |
| Connect Inc. | 1 | 1 |
| Connectedio | 2 | 8 |
| Connection-tester Project | 1 | 1 |
| Connections Project | 1 | 52 |
| Connectix | 1 | 3 |
| Connectize | 1 | 7 |
| Connectwise | 7 | 25 |
| Connie-lang Project | 1 | 1 |
| Connman | 1 | 13 |
| Connx | 1 | 1 |
| Conpresso | 1 | 2 |
| Conquer-once Project | 1 | 1 |
| Conquest | 1 | 2 |
| Conquest Dicom Server Project | 1 | 1 |
| Conqueue Project | 1 | 1 |
| Conrad Hotel Project | 1 | 0 |
| Consensys | 2 | 2 |
| ConsoleTVs | 1 | 1 |
| Consona | 6 | 28 |
| Constant Contact | 1 | 3 |
| Constantin Charissis | 1 | 4 |
| Constructor Component | 1 | 1 |
| Constructr | 1 | 3 |
| Construtiva | 1 | 0 |
| Consulo | 1 | 0 |
| Consumer Complaints Clone Script Project | 1 | 1 |
| Consumer Reviews Script Project | 1 | 2 |
| Contact Form - WPManageNinja LLC | 1 | 2 |
| Contact Form Email | 1 | 3 |
| Contact Form With Captcha | 1 | 1 |
| Contact-form-7-datepicker Project | 1 | 1 |
| Contact-form-7-to-database-extension Project | 1 | 1 |
| Contact-form-with-messages-entry-management Project | 1 | 1 |
| Contact Forms | 1 | 2 |
| Contactus | 1 | 0 |
| Containers-image Project | 1 | 1 |
| Containers Project | 1 | 2 |
| Containous | 1 | 5 |
| Containrrr | 1 | 1 |
| Contao | 2 | 18 |
| Contec | 7 | 21 |
| Contec CO.,LTD. | 1 | 3 |
| Contec Co., Ltd. | 2 | 25 |
| Contec Health | 1 | 5 |
| Contec-touch | 1 | 1 |
| Contelligent | 1 | 1 |
| Contempoinc | 2 | 2 |
| Contenido | 2 | 2 |
| Contenite | 1 | 1 |
| Contens | 1 | 2 |
| Content Staging | 1 | 1 |
| Content2web | 1 | 1 |
| Content\*builder | 1 | 2 |
| Content Audit Project | 1 | 1 |
| Content Cards Project | 1 | 1 |
| Content Construction Kit Project | 1 | 4 |
| Content Management System Project | 1 | 16 |
| Content Now | 1 | 1 |
| Content Rating Extbase Project | 1 | 0 |
| Content Rating Project | 1 | 0 |
| Contentcustomizer | 1 | 2 |
| Contentful | 1 | 1 |
| Contentkeeper Technologies | 1 | 1 |
| Contentlion | 1 | 1 |
| Contentserv | 1 | 3 |
| Contest Gallery | 2 | 21 |
| Contest-Gallery | 1 | 19 |
| Context Project | 1 | 0 |
| Conti | 1 | 3 |
| Contiki-ng | 2 | 19 |
| Contiki-ng Project | 1 | 14 |
| Contiki-os | 2 | 15 |
