| Mitsubishi Electric | C Controller Interface Module Utility | 1 |
| GNU | C Library | 1 |
| Microsoft | C SDK | 2 |
| Microsoft | C SDK For Azure IoT | 1 |
| Microsoft | C SDK For Azure IoT Release LTS 02 2020 Ref02 | 1 |
| Microsoft | C SDK For Azure IoT Release LTS 07 2020 Ref02 | 1 |
| Microsoft | C# SDK | 1 |
| HGiga | C&Cmail | 2 |
| Arista | C-100 Firmware | 6 |
| Arista | C-110 Firmware | 6 |
| Arista | C-120 Firmware | 6 |
| Arista | C-130 Firmware | 6 |
| Arista | C-200 Firmware | 7 |
| Arista | C-230 Firmware | 7 |
| Arista | C-235 Firmware | 7 |
| Arista | C-250 Firmware | 7 |
| Arista | C-260 Firmware | 7 |
| Arista | C-65 Firmware | 8 |
| Arista | C-75 Firmware | 8 |
| Schneider Electric | C-Bus Network Automation Controller, LSS5500NAC | 2 |
| Schneider Electric | C-Bus Toolkit | 3 |
| Johnson Controls | C-CURE 9000 | 1 |
| AutomationDirect | C-More Micro (Part Number EA-PGMSW) | 1 |
| AutomationDirect | C-More Programming Software (Part Number EA9-PGMSW) | 1 |
| Realink | C-arbre | 2 |
| C-ares | C-ares | 9 |
| C-ares Project | C-ares | 9 |
| Daniel Stenberg | C-ares | 9 |
| C-blosc2 Project | C-blosc2 | 5 |
| C-board Moyuku Project | C-board Moyuku | 2 |
| Schneider-electric | C-bus Toolkit | 6 |
| Hl7 | C-cda | 3 |
| University Of Washington | C-client | 1 |
| C-data Onu4ferw Project | C-data Onu4ferw Firmware | 1 |
| Schneider-electric | C-gate Server | 1 |
| C-http Project | C-http | 1 |
| C-icap Project | C-icap | 2 |
| Elementsproject | C-lightning | 2 |
| AutomationDirect | C-more EA9 | 2 |
| Automationdirect | C-more Ea9-rhi Firmware | 1 |
| Automationdirect | C-more Ea9-t10cl Firmware | 1 |
| Automationdirect | C-more Ea9-t10wcl Firmware | 1 |
| Automationdirect | C-more Ea9-t12cl Firmware | 1 |
| Automationdirect | C-more Ea9-t15cl-r Firmware | 1 |
| Automationdirect | C-more Ea9-t15cl Firmware | 1 |
| Automationdirect | C-more Ea9-t6cl-r Firmware | 1 |
| Automationdirect | C-more Ea9-t6cl Firmware | 1 |
| Automationdirect | C-more Ea9-t7cl-r Firmware | 1 |
| Automationdirect | C-more Ea9-t7cl Firmware | 1 |
| Automationdirect | C-more Ea9-t8cl Firmware | 1 |
| C-news.fr | C-news | 3 |
| Faircom | C-treeace | 1 |
| C.p.sub Project | C.p.sub | 2 |
| Crgroup-lb | C.r. Group | 1 |
| Automation Direct | C0-1x CPUs | 5 |
| Foscam | C1 | 1 |
| Orckestra | C1 CMS | 1 |
| Orckestra | C1-CMS-Foundation | 2 |
| Actiontec | C1000a Firmware | 1 |
| Zyxel | C1000z Firmware | 1 |
| Axis | C1004-e Firmware | 7 |
| Rstinstruments | C109 Firmware | 1 |
| Orckestra | C1 Cms | 1 |
| Contelligent | C1 Financial Services | 1 |
| Foscam | C1 Firmware | 9 |
| Motorola | C1 Firmware | 9 |
| Foscam | C1 Lite | 1 |
| Foscam | C1 Lite Firmware | 4 |
| Motorola | C1 Mwr03 Firmware | 1 |
| Reolink | C1 Pro Firmware | 1 |
| Foscam | C2 | 1 |
| Technicolor | C2000T | 1 |
| Axis | C2005 Firmware | 7 |
| Intel | C202 Chipset | 2 |
| Intel | C204 Chipset | 2 |
| Intel | C206 Chipset | 2 |
| Tp-link | C20i Firmware | 4 |
| Technicolor | C2100T | 1 |
| Lexmark | C2132 Firmware | 4 |
| Intel | C216 Chipset | 1 |
| Lexmark | C2240 Firmware | 7 |
| Intel | C232 | 1 |
| Lexmark | C2325 Firmware | 7 |
| Lexmark | C2326 Firmware | 7 |
| Intel | C232 Firmware | 1 |
| Intel | C236 | 1 |
| Intel | C236 Firmware | 1 |
| Intel | C240 Series Firmware | 1 |
| Intel | C242 | 1 |
| Lexmark | C2425 Firmware | 7 |
| Intel | C242 Firmware | 1 |
| Intel | C246 | 1 |
| Intel | C246 Firmware | 1 |
| Lexmark | C2535 Firmware | 7 |
| Foscam | C2 Application Firmware | 20 |
| Foscam | C2 Firmware | 8 |
| Tp-link | C2 Firmware | 8 |
| Reolink | C2 Pro Firmware | 1 |
| Foscam | C2 System Firmware | 20 |
| C2enterprise | C2 Webresource | 1 |
