Kontact

evolution-kolab   (Compare Project)

High Activity

Mostly written in C

License: LGPL

Kolab Groupware Solution   (Compare Project)

Very High Activity

Mostly written in PHP

License: GPL-2.0+

Kolab-WS   (Compare Project)

Very Low Activity

Mostly written in Java

License: AGPL-3.0

KDE PIM   (Compare Project)

Activity Not Available

Mostly written in C++

License: GPL-2.0+, LGPL

syncphony   (Compare Project)

Very Low Activity

Mostly written in Java

License: AGPL 3.0+

Chandler   (Compare Project)

Inactive

Mostly written in Python

License: Apache-2.0

Tine 2.0   (Compare Project)

Activity Not Available

Mostly written in PHP

License: AGPL

Zarafa Collaboration Platform   (Compare Project)

Activity Not Available

License: AGPL

Horde   (Compare Project)

Activity Not Available

Mostly written in PHP

License: Apache-ish License, BSD-3-Clause, GPL-2.0+, LGPL

OBM   (Compare Project)

Very High Activity

Mostly written in PHP

License: AGPL 3.0+

KDE PIM   (Compare Project)

Activity Not Available

Mostly written in C++

License: GPL-2.0+, LGPL

Akregator (KDE)   (Compare Project)

Activity Not Available

Mostly written in C++

License: Unknown

Calligra Suite   (Compare Project)

Very High Activity

Mostly written in C++

License: GPL-2.0+, LGPL-2.1+

Konversation   (Compare Project)

Moderate Activity

Mostly written in C++

License: GPL-2.0+

Kopete IM Client (KDE)   (Compare Project)

Moderate Activity

Mostly written in C++

License: GPL-2.0+

digiKam   (Compare Project)

Very High Activity

Mostly written in C++

License: GPL-2.0+

Gwenview   (Compare Project)

High Activity

Mostly written in C++

License: GPL-2.0+

Kompare (KDE)   (Compare Project)

Activity Not Available

Mostly written in C++

License: GPL-2.0+

Konqueror   (Compare Project)

Activity Not Available

Mostly written in C++

License: GPL-2.0+

KDElibs (KDE)   (Compare Project)

Very High Activity

Mostly written in C++

License: LGPL