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.

Baloo provides file searching and indexing. It does so by maintaining an index of the contents of your files.

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.

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.

KDED stands for KDE Daemon. KDED runs in the background and performs a number of small tasks. Some of these tasks are built in, others are started on demand.

This framework contains an interface to KWallet, a safe desktop-wide storage for passwords and the kwalletd daemon used to safely store the passwords on KDE work spaces.

KI18n provides functionality for internationalizing user interface text in applications, based on the GNU Gettext translation system. It wraps the standard Gettext functionality, so that the programmers and translators can use the familiar Gettext tools and workflows.

KI18n provides additional functionality as well, for both programmers and translators, which can help to achieve a higher overall quality of source and translated text. This includes argument capturing, customizable markup, and translation scripting.

The Qt Cryptographic Architecture (QCA) provides a straightforward and cross-platform API for a range of cryptographic features, including SSL/TLS, X.509 certificates, SASL, OpenPGP, S/MIME CMS, and smart cards.

KUnitConversion provides functions to convert values in different physical units. It supports converting different prefixes (e.g. kilo, mega, giga) as well as converting between different unit systems (e.g. liters, gallons).

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.

KCMUtils provides various classes to work with KCModules. KCModules can be created with the KConfigWidgets framework.

This framework implements a lot of file management functions. It supports accessing files locally as well as via HTTP and FTP out of the box and can be extended by plugins to support other protocols as well. There is a variety of plugins available, e.g. to support access via SSH. The framework can also be used to bridge a native protocol to a file-based interface. This makes the data accessible in all applications using the KDE file dialog or any other KIO enabled infrastructure.

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.

KDNSSD is a library for handling the DNS-based Service Discovery Protocol (DNS-SD), the layer of Zeroconf that allows network services, such as printers, to be discovered without any user intervention or centralized infrastructure.

KCMUtils provides various classes to work with KCModules. KCModules can be created with the KConfigWidgets framework.

KService provides a plugin framework for handling desktop services. Services can be applications or libraries. They can be bound to MIME types or handled by application specific code.

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

Oxygen icon theme for the KDE desktop

KFileMetaData provides a simple library for extracting the text and metadata from a number of different files. This library is typically used by file indexers to retrieve the metadata. This library can also be used by applications to write metadata.

pulseaudio-qt is a Qt-style wrapper for libpulse. It allows querying and manipulation of various PulseAudio objects such as Sinks, Sources and Streams. It does not wrap the full feature set of libpulse.

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.

KGlobalAccel allows you to have global accelerators that are independent of the focused window. Unlike regular shortcuts, the application's window does not need focus for them to be activated.

Solid is a device integration framework. It provides a way of querying and interacting with hardware independently of the underlying operating system.

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).