Chocolate Doom Kindopen-source software, source portImplemented inCLicenceGNU General Public License, version 2.0 or later
Chromium Embedded Framework Kindwidget toolkit, free softwareImplemented inC++Licence3-clause BSD License
Cinder Kindsoftware library, free and open-source software, application frameworkImplemented inC, C++Licence2-clause BSD License
Clap KindRust library, free softwareImplemented inRustLicenceApache Software License 2.0, MIT License
Clickteam Fusion 2.5 Kindgame engine versionDeveloperClickteamPlatformMicrosoft Windows, iOS, Android
Cocoa Kindwidget toolkit, application programming interfaceImplemented inObjective-CDeveloperApple Inc.
Code page 936 KindDBCS, variable-width character encoding, DOS OEM code page, Windows code pageBased onGBK
Code page 949 KindDBCS, variable-width character encoding, DOS OEM code page, Windows code pageBased onEUC-KR
Code page 950 KindDBCS, variable-width character encoding, DOS OEM code page, Windows code pageBased onBig5
Cognee Kindsemantic web software, AI agent memory softwareImplemented inPythonLicenceApache Software License 2.0
Compose Multiplatform Kindfree and open-source softwareImplemented inKotlinLicenceApache Software License 2.0
Confidential Consortium Framework Kindblockchain frameworkLicenceApache Software License 2.0Appeared2019
CPCtelera LicenceGNU General Public License, version 3.0, GNU Lesser General Public License, version 3.0Appeared2017First releaseJuly 16, 2017
Crossws KindJavaScript framework, free and open-source software, application serverImplemented inTypeScriptLicenceMIT License
Crypton Kindweb framework, free software, JavaScript libraryImplemented inJavaScriptLicenceGNU Affero General Public License
Crystal Space Kindapplication software, game engine, free software, graphics engineImplemented inC++LicenceGNU Lesser General Public License, GNU General Public License