KDE Products
The KDE Frameworks

Providing everything from simple utility classes to integrated solutions for common requirements of desktop applications
Platforms: Android (partial) | FreeBSD (partial) | Linux | macOS (partial) | Windows (partial)
KDE PIM
KDE PIM provides set of libraries and application to access and manage personal information like emails, contacts, events, etc.
Platform: Linux
Futuresql

Non-blocking database framework for Qt
Platforms: Android | FreeBSD | iOS | Linux | macOS | Windows
KCGroups

Control cgroup resources through systemd dbus interface
Platform: Linux
KDEGames

Common code and data for many KDE games
Platforms: FreeBSD | Linux | Windows
KExiv2

Wrapper around Exiv2 library to manipulate picture metadata as EXIF and XMP
Platforms: FreeBSD | Linux | Windows
KHealthCertificate

Digital vaccination, test and recovery certificate parsing
Platforms: Android | FreeBSD | Linux | macOS | Windows
Kirigami-addons

Convergent visual components ("widgets") for Kirigami-based applications
Platforms: Android | FreeBSD | Linux
KompareDiff2

Library to compare files and strings
Platforms: FreeBSD | Linux | Windows
KOpeningHours

OSM opening hours expression parser and evaluator
Platforms: Android | FreeBSD | Linux | macOS | Windows
KOSMIndoorMap

OSM indoor map QML component
Platforms: Android | FreeBSD | Linux | macOS | Windows
Krita

scripting api for Krita
Platforms: Android | FreeBSD | Linux | macOS | Windows
KSaneCore

Qt interface for the SANE library for scanner hardware
Platforms: FreeBSD | Linux
Kstars

KStars is free, open source, cross-platform Astronomy Software.
Platforms: Linux | macOS | Windows
KTextAddons

Text addons (autocorrection, text to speak, grammar checking, text translator, emoticon support, custom editor)
Platforms: FreeBSD | Linux | macOS | Windows
KWeatherCore

Query weather data
Platforms: Android | FreeBSD | Linux | macOS | Windows
LibKEduVocDocument

libKEduVocDocument is a library for reading and writing vocabulary files used by Parley, Kanagram, KHangman and KWordQuiz.
Platforms: Android | FreeBSD | Linux | macOS | Windows
LibKmahjongg

For loading and rendering of Mahjongg tilesets and associated backgrounds
Platforms: FreeBSD | Linux | macOS | Windows
Marble

Marble framework, a library for maps, virtual globes and world atlases
Platforms: Android | Linux | macOS | Windows
MauiKit Frameworks

Provides utilities to build applications according to the Maui style
Platforms: Android | FreeBSD (partial) | Linux | macOS (unmantained) | Windows (unmantained)
Md4qt

md4qt is a header-only C++ library for parsing Markdown.
Platforms: Android | FreeBSD | Linux | Windows
Okular

Okular, the unified document viewer
Platforms: Linux | macOS | Windows
Perceptual Color

GUI components for choosing colors, with focus on an intuitive and perceptually uniform presentation.
Platforms: FreeBSD | Linux | macOS | Windows
Phonon

Phonon, the Qt multimedia abstraction library.
Platforms: FreeBSD | Linux | Windows
Plasma

Provides APIs to build plasma widgets, wallpaper plugins and more.
Platforms: FreeBSD | Linux
PlasmaWaylandProtocols

Provides the xml files of non-standard wayland protocols used in Plasma.
Platforms: FreeBSD | Linux
QCA

QCA (Qt Cryptographic Architecture) provides a straightforward and cross-platform crypto API
Platforms: FreeBSD | Linux | Windows
Qt Accessibility Client

Accessibilty tools helper library, used e.g. by screen readers
Platforms: FreeBSD | Linux
The KDiagram Libraries

Libraries for creating charts and Gantt diagrams
Platforms: FreeBSD | Linux | macOS | Windows