Cappuccino Kindweb framework, free and open-source softwareImplemented inObjective-JLicenceGNU Lesser General Public License, version 2.1
Decibel Kindfree softwareImplemented inPythonLicenceGNU Lesser General Public License, version 2.1, GNU General Public License, version 2.0 or later
DikuMUD Kindserver software for MUD-like gamesAppeared1990LicenceGNU Lesser General Public License, version 2.1
Grilo Kindfree softwareLatest version0.3.14 (October 5, 2021)LicenceGNU Lesser General Public License, version 2.1
Kopi KindGNU package, free software, application frameworkImplemented inJavaLatest version2.3B (September 17, 2007)
Phonon Kindmultimedia framework, free softwareImplemented inC++Latest version4.12.0 (November 2, 2023)