As the names suggest they implement a Client respectively a Server API for the Wayland protocol. The API is Qt-styled removing the needs to interact with a for a Qt developer uncomfortable low-level C-API. For example the callback mechanism from the Wayland API is replaced by signals, data types are adjusted to be what a Qt developer expects - two arguments of int are represented by a QPoint or a QSize.

This framework helps implement autocompletion in Qt-based applications. It provides a set of completion-ready widgets, or can be integrated it into your application's other widgets.

KNotification is used to notify the user of an event. It covers feedback and persistent events.

KDBusAddons provides convenience classes on top of QtDBus, as well as an API to create KDED modules.

Add-on library to Qt which adds JavaScript scripting support.

This library provides text addons (autocorrection, text to speak, grammar checking, text translator, emoticon support) for Qt applications.

KWindowSystem provides information about and allows interaction with the windowing system. It provides a high level API, which is windowing system independent and has platform specific implementations. This API is inspired by X11 and thus not all functionality is available on all windowing systems.

In addition to the high level API, this framework also provides several lower level classes for interaction with the X Windowing System.

KDeclarative provides integration of QML and KDE work spaces. It's comprises two parts: a library used by the C++ part of your application to integrate QML with KDE Frameworks specific features, and a series of QML imports that offer bindings to some of the Frameworks.

This is a stand-alone implementation of the Kate syntax highlighting engine. It's meant as a building block for text editors as well as for simple highlighted text rendering (e.g. as HTML), supporting both integration with a custom editor as well as a ready-to-use QSyntaxHighlighter sub-class.

The KNewStuff library implements collaborative data sharing for applications. It uses libattica to support the Open Collaboration Services specification.

KXMLGUI provides a framework for managing menu and toolbar actions in an abstract way. The actions are configured through a XML description and hooks in the application code. The framework supports merging of multiple descriptions for integrating actions from plugins.

NetworkManagerQt provides access to all NetworkManager features exposed on DBus. It allows you to manage your connections and control your network devices and also provides a library for parsing connection settings which are used in DBus communication.

This library provides a vCard data model, vCard input/output, contact group management, locale-aware address formatting, and localized country name to ISO 3166-1 alpha 2 code mapping and vice verca.

KCoreAddons provides classes built on top of QtCore to perform various tasks such as manipulating mime types, autosaving files, creating backup files, generating random sequences, performing text manipulations such as macro replacement, accessing user information and many more.

bluez-qt is a Qt-style library for accessing the bluez Bluetooth stack. It is used by the KDE Bluetooth stack, BlueDevil.

A library for rendering SVG-based themes with stylesheet re-coloring and on-disk caching.

KJobWIdgets provides widgets for showing progress of asynchronous jobs.

This library provides access to and handling of calendar data. It supports the standard formats iCalendar and vCalendar and the group scheduling standard iTIP.

A calendar contains information like incidences (events, to-dos, journals), alarms, time zones, and other useful information. This API provides access to that calendar information via well known calendar formats iCalendar (or iCal) and the older vCalendar.

Breeze provides a freedesktop.org compatible icon theme. It is the default icon theme for the KDE Plasma desktop.

Kirigami is a set of high level QtQuick components looking and feeling well on both mobile and desktop devices. They ease the creation of applications that follow the Kirigami Human Interface Guidelines.

The plasma framework provides QML components, libplasma and script engines.

KTextEditor provides a powerful text editor component that you can embed in your application, either as a KPart or using the KF5::TextEditor library.

KCodecs provide a collection of methods to manipulate strings using various encodings.

It can automatically determine the charset of a string, translate XML entities, validate email addresses, and find encodings by name in a more tolerant way than QTextCodec (useful e.g. for data coming from the Internet).

KBookmarks lets you access and manipulate bookmarks stored using the XBEL format.