| Cloud Foundry | CAPI-release | 1 |
| Unknown | CAPTCHA 4WP | 1 |
| Cassproject | CASS | 1 |
| Codeboxr | CBX Currency Converter | 1 |
| Cc-tweaked | CC-Tweaked | 1 |
| Bender / Ebee | CC612 | 8 |
| Bender / Ebee | CC613 | 8 |
| Cloud Foundry | CF Networking Release | 1 |
| Vsourz Digital | CF7 Invisible ReCAPTCHA | 1 |
| NASA | CFITSIO | 5 |
| CFME | CFME | 3 |
| Corega Inc | CG-WLR300NX | 3 |
| Cloudflare | CIRCL | 1 |
| Omron | CJ1M SYSMAC CS-series | 1 |
| CELSYS, Inc. | CLIP STUDIO Series | 1 |
| PHOENIX CONTACT | CLOUD CLIENT 1101T-TX/TX | 2 |
| CLUEVO | CLUEVO LMS, E-Learning Platform | 2 |
| NEC Corporation | CLUSTERPRO X (EXPRESSCLUSTER X) | 4 |
| NEC Corporation | CLUSTERPRO X SingleServerSafe (EXPRESSCLUSTER X SingleServerSafe) | 5 |
| NEC Corporation | CLUSTERPRO X(EXPRESSCLUSTER X) | 1 |
| Device42 | CMDB | 4 |
| Eatan | CMS | 39 |
| Elefant | CMS | 39 |
| Everywhere | CMS | 39 |
| Yunjing | CMS | 39 |
| Tiki Wiki | CMS Groupware | 3 |
| Micro Focus | CMS Server | 1 |
| Delta Electronics | CNCSoft | 5 |
| Delta Electronics | CNCSoft ScreenEditor | 2 |
| CODESYS | CODESYS Control Runtime System Toolkit | 41 |
| CODESYS | CODESYS Control For BeagleBone SL | 42 |
| CODESYS | CODESYS Control For Beckhoff CX9020 SL | 8 |
| CODESYS | CODESYS Control For IOT2000 SL | 42 |
| CODESYS | CODESYS Control For Linux ARM SL | 1 |
| CODESYS | CODESYS Control For Linux SL | 42 |
| CODESYS | CODESYS Control For PFC100 SL | 42 |
| CODESYS | CODESYS Control For PFC200 SL | 42 |
| CODESYS | CODESYS Control For Raspberry Pi SL | 42 |
| CODESYS | CODESYS Control For WAGO Touch Panels 600 SL | 42 |
| CODESYS | CODESYS Control For EmPC-A/iMX6 SL | 42 |
| CODESYS | CODESYS PLCWinNT | 2 |
| CODESYS | CODESYS Runtime Toolkit 32 Bit Full | 2 |
| CODESYS | CODESYS Runtime Toolkit For Linux Or QNX | 1 |
| CodePeople | CP Blocks | 2 |
| Talos | CPP-Ethereum | 9 |
| Anurag Deshmukh | CPT Shortcode Generator | 2 |
| SAP | CRM | 4 |
| Wipeout Media | CSS & JavaScript Toolbox | 1 |
| Pi Websolution | CSS JS Manager, Async JavaScript, Defer Render Blocking CSS Supports WooCommerce | 1 |
| Denis Kobozev | CSV Importer | 1 |
| Plus One | CSV+ | 1 |
| Creatomatic Ltd | CSprite | 1 |
| SUNNET | CTMS | 1 |
| VillaTheme | CURCY – Multi Currency For WooCommerce | 1 |
| UPrism.io | CURIX 7.0 Agent | 1 |
| SmartStar Software | CWS Web-Base | 3 |
| Omron | CX-One | 4 |
| Omron | CX-Position | 7 |
| OMRON Corporation | CX-Programmer | 18 |
| Omron | CX-Programmer Within CX-One | 1 |
| Omron | CX-Protocol | 3 |
| Omron | CX-Protocol Within CX-One | 1 |
| Omron | CX-Server | 3 |
| ICS-CERT | CX-Supervisor | 11 |
| Omron | CX-Supervisor | 11 |
| Sogou | C\+\+ Workflow | 1 |
| C\/c\+\+ Advanced Lint Project | C\/c\+\+ Advanced Lint | 1 |
| Broadcom | Ca Harvest Software Change Manager | 1 |
| Cacheguard | Cacheguardos | 1 |
| Tribe Interactive | Caddy – Smart Side Cart For WooCommerce | 1 |
| Irfanview | Cadimage | 15 |
| Redhat | Cairo | 11 |
| Cakephp | Cakephp | 10 |
| Unknown | Caldera Forms Google Sheets Connector | 1 |
| Kieranoshea | Calendar | 13 |
| Endonesia | Calendar Module | 1 |
| Activision | Call Of Duty 4 | 1 |
| NEC Platforms, Ltd. | Calsos CSDX And CSDJ Series Products | 2 |
| Cambio Project | Cambio | 1 |
| Apache | Camel | 11 |
| Camp Style Project Line Project | Camp Style Project Line | 1 |
| Campaign Monitor Project | Campaign Monitor | 1 |
| WooCommerce | Canada Post Shipping Method | 1 |
| Auieo | Candidats | 10 |
| Canna | Canna | 2 |
| Cantata Project | Cantata | 6 |
| Automattic | Canvas | 3 |
| ACD Systems | Canvas Draw | 6 |
| Pivotal | Capi-release | 14 |
| Capsule8 | Capsule8 | 1 |
| Checkpoint | Capsule Docs Standalone Client | 1 |
| Vinoj Cardoza | Captcha Code (WordPress Plugin) | 1 |
| Wp-buy | Captchinoo, Google Recaptcha For Admin Login Page | 1 |
| New-place | Captivate | 7 |
| Phpgurukul | Car Rental Portal | 2 |
| Car Rental System Project | Car Rental System | 2 |
| Carbonblack | Carbon Black | 4 |
| Vmware | Carbon Black Cloud Workload | 1 |
| Carceresbe Project | Carceresbe | 1 |
| Acer | Care Center | 2 |
