| Commerceguys | 2 | 67 |
| Commercial Interactive Media | 1 | 2 |
| Commodityrentals | 7 | 7 |
| Common Controls Replacement Project | 2 | 3 |
| Common-lisp-controller | 1 | 1 |
| Common-solutions | 1 | 1 |
| Common-workflow-language | 1 | 1 |
| Common1 | 2 | 2 |
| Commoninja | 1 | 1 |
| Commonname | 1 | 1 |
| Commonninja | 1 | 1 |
| Commons Wikis Project | 1 | 1 |
| Commonwl | 1 | 1 |
| Commscope | 35 | 89 |
| Commsy | 1 | 2 |
| Commtouch | 1 | 1 |
| Communigate | 2 | 12 |
| Communilink | 1 | 2 |
| Community Architect | 1 | 1 |
| Community Cms | 1 | 2 |
| Community Events Project | 1 | 3 |
| Community Link Pro Web Editor | 1 | 1 |
| Communityfactory | 1 | 1 |
| Communityserver.org | 1 | 6 |
| Commvault | 5 | 863 |
| Comoblog Project | 1 | 1 |
| Comodo | 10 | 302 |
| Compact Arena Project | 1 | 1 |
| Compact Cms | 1 | 1 |
| Compal | 6 | 10 |
| Compal Broadband Networks | 3 | 20 |
| Companionway | 1 | 1 |
| Company | 2 | 8 |
| Company Website Cms Project | 1 | 10 |
| Company Website/cms Project | 1 | 1 |
| Compaq | 42 | 70 |
| Comparex | 1 | 2 |
| Compass Rose Project | 1 | 1 |
| Compass-compile Project | 1 | 1 |
| Compassionuk | 1 | 1 |
| Compassplus | 4 | 5 |
| Compex | 1 | 1 |
| Compfight Project | 1 | 2 |
| Compile-sass Project | 1 | 1 |
| Compiz | 2 | 4 |
| Complete Online Job Search System Project | 1 | 14 |
| Complete Php Counter | 1 | 2 |
| Complete Responsive Cms Blog Project | 1 | 1 |
| Compmaster.prv.pl | 1 | 3 |
| Compo | 1 | 3 |
| Component-flatten Project | 1 | 1 |
| Componentone | 3 | 4 |
| Components For Wp Bakery Page Builder Project | 1 | 1 |
| Componentslab | 1 | 1 |
| Composer | 2 | 10 |
| Composr Project | 1 | 4 |
| Compound | 1 | 1 |
| Compression And Archive Extensions Project | 1 | 1 |
| Compression And Archive Extensions Tz Project | 1 | 1 |
| Comprotech | 8 | 40 |
| Compteur | 1 | 2 |
| Compulab | 4 | 6 |
| Computalynx | 3 | 3 |
| Computer And Mobile Repair Shop Management System Project | 1 | 1 |
| Computer Associates | 12 | 89 |
| Computer Power Solutions | 1 | 1 |
| Computer Software Manufaktur | 1 | 5 |
| Computer-insel | 1 | 15 |
| Computerinsel | 2 | 28 |
| Computerlab | 1 | 1 |
| Computeroil | 1 | 1 |
| Computing For Good | 1 | 3 |
| Computrols | 2 | 10 |
| Compuware | 2 | 3 |
| Comrak Project | 1 | 4 |
| Comscripts | 11 | 21 |
| Comsenz | 6 | 24 |
| Comstock | 1 | 1 |
| Comtechtel | 4 | 10 |
| Comtrend | 10 | 11 |
| Comus | 1 | 1 |
| Comvigo | 1 | 1 |
| Comvironment | 1 | 1 |
| Con0217 Project | 1 | 1 |
| Conarc | 1 | 1 |
| Concatus | 1 | 1 |
| Conceptcms | 1 | 1 |
| Conceptronic | 7 | 17 |
| Concerto-signage | 1 | 1 |
| Concread Project | 1 | 1 |
| Concrete Cms | 1 | 87 |
| Concrete5 | 2 | 9 |
| Concrete5-legacy Project | 1 | 5 |
| Concretecms | 1 | 87 |
| Concurrent Versions Software Project | 1 | 1 |
| Concursive | 3 | 3 |
| Conda | 1 | 1 |
| Condor | 1 | 18 |
| Condor Project | 1 | 18 |
| Conduit-rust | 1 | 1 |
