KDE Libraries | KDE API Reference Developer API Documentation API KDE Human Interface Guidelines KDE API Reference KDE Libraries KDE Libraries KDE Frameworks The KDE Frameworks build on the Qt framework, providing everything from simple utility classes (such as those in KCoreAddons) to integrated solutions for common requirements of desktop applications (such as KNewStuff, for fetching downloadable add-on content in an application, or the powerful KIO multi-protocol file access framework). The KDE Frameworks can be used in CMake-based and QMake-based projects, and most of them are portable to at least Windows, Mac and Linux. The documentation of each framework has code snippets that show how to include the framework in a QMake or CMake project. The frameworks are divided into four tiers, based on the kind of dependencies that they have. For instance, Tier 1 frameworks depend on Qt and possibly some third-party libraries, but not on other frameworks. This makes them easy to integrate into existing applications. Tier 0 ECM Extra CMake modules Tier 1 Tier 1 frameworks depend only on Qt (and possibly a small number of other third-party libraries), so can easily be used by any Qt-based project. Attica Open Collaboration Services API BluezQt Qt wrapper for BlueZ 5 DBus API KArchive File compression KCalendarCore The KDE calendar access library KCodecs Text encoding KConfig Configuration system KCoreAddons Addons to QtCore KDBusAddons Addons to QtDBus KGlobalAccel Add support for global workspace shortcuts KGuiAddons Addons to QtGui KHolidays Holiday calculation library KI18n Advanced internationalization framework KIdleTime Monitoring user activity Kirigami QtQuick plugins to build user interfaces based on the KDE human interface guidelines KItemModels Models for Qt Model/View system KItemViews Widget addons for Qt Model/View KPlotting Lightweight plotting framework KQuickCharts A QtQuick module providing high-performance charts KSyntaxHighlighting Syntax Highlighting KTextTemplate Library to allow application developers to separate the structure of documents from the data they contain KUserFeedback User feedback framework KWidgetsAddons Addons to QtWidgets KWindowSystem Access to the windowing system ModemManagerQt Qt wrapper for ModemManager API NetworkManagerQt Qt wrapper for NetworkManager API Prison Barcode abstraction layer providing uniform access to generation of barcodes Solid Hardware integration and detection Sonnet Support for spellchecking ThreadWeaver High-level multithreading framework Tier 2 Tier 2 frameworks additionally depend on tier 1 frameworks, but still have easily manageable dependencies. KAuth Abstraction to system policy and authentication features KColorScheme Classes to interact with KColorScheme KCompletion Text completion helpers and widgets KContacts Support for vCard contacts KCrash Support for application crash analysis and bug report from apps KDeclarative Provides integration of QML and KDE Frameworks KFileMetaData A file metadata and text extraction library KNotifications Abstraction for system notifications KPackage Library to load and install packages of non binary files as they were a plugin KPty Pty abstraction KService Library for querying installed applications and their associated file types KStatusNotifierItem Implementation of Status Notifier Items KUnitConversion Support for unit conversion Syndication An RSS/Atom parser library KMime The KMime Library Tier 3 Tier 3 frameworks are generally more powerful, comprehensive packages, and consequently have more complex dependencies. Baloo Baloo is a file indexing and searching framework KBookmarks Support for bookmarks and the XBEL format KCMUtils Utilities for working with KCModules KConfigWidgets Widgets for configuration dialogs KDAV An DAV protocol implementation with KJobs KDESu Integration with su for elevated privileges KIconThemes Support for icon themes KIO Resource and network access abstraction KJobWidgets Widgets for tracking KJob instances KNewStuff Support for downloading application assets from the network KNotifyConfig Configuration system for KNotify KParts Document centric plugin system KPeople Provides access to all contacts and the people who hold them KRunner Parallelized query system KSvg A library for rendering SVG-based themes with stylesheet re-coloring and on-disk caching KTextEditor Advanced embeddable text editor KTextWidgets Advanced text editing widgets KWallet Secure and unified container for user passwords KXMLGui User configurable main windows Purpose Offers available actions for a specific purpose. Tier 4 Tier 4 frameworks can be mostly ignored by application programmers; this tier consists of plugins acting behind the scenes to provide additional functionality or platform integration to existing frameworks (including Qt). FrameworkIntegration Workspace and cross-framework integration plugins. Other Libraries These libraries are also offered by the KDE Community but don't neccesarily provide the same quality standards and compatibility promises as the KDE Frameworks. Plasma Plasma is a desktop environment for Linux and FreeBSD but it's built as a platforms in which plugins can be built to extends its features or completely new desktop environment can be built on top. LibPlasma Building Blocks for Plasma KWin Scripting API for KWin Union A Qt style supporting both QtQuick and QtWidgets KDecoration Plugin based library to create window decorations. KPipeWire Convenient classes to use PipeWire LayerShellQt Layer Shell Qt Libksysguard Library to retrieve and display information on the current status of computer hardware Plasma Workspace Plasma Workspace Plasma5Support Migration aids for plasma5 deprecated classes Plasma Activities Activities Libary PlasmaActivitiesStats Activities Stats Libary KNightTime Helpers for scheduling the dark-light cycle KDE PIM KDE PIM provides a set of libraries and applications to access and manage personal information like emails, contacts, events, etc. KDE PIM provides a set of libraries to parse and interact with various standardized PIM data formats, like ICAL (KCalendarCore) or VCARD (KContacts). The backbone of the entire suite is Akonadi, the PIM storage framework. Akonadi provides unified API to access and manage any kind of PIM data regardless of the actual storage backend. There are quite a few other libraries that provide PIM-specific widgets and utilities and can be useful for application developers who need to work with PIM data in their projects. Please note that unless stated otherwise, none of the libraries have stable API or ABI as of now. We are trying to keep the changes small and we always announce big changes ahead on the mailing lists, but as the project evolves we might need to adjust some API here and there. Akonadi PIM Storage Framework Akonadi Calendar Akonadi Calendar Library Akonadi Contacts Akonadi Contacts Library Akonadi Mime Akonadi Mime Library Akonadi Search Akonadi indexing and searching Library CalendarSupport Calendar Support Library Eventviews Event Views Library GrantleeTheme KDE PIM Grantlee theme support library Gravatar Gravatar Support Library Indicenceeditor Incidenceeditor Library KCalUtils Calendar Utility Library KGAPI Implementation of APIs for various Google services KIdentityManagement Manage PIM Identity KIMAP A job-based API for interacting with IMAP servers KItinerary Itinerary extraction and data model KLdap LDAP Support Library KMbox MBox library support KontactInterface Kontact Plugin Interface Library KPimTextEdit Advanced text editor which provide advanced html feature KPkPass PkPass File Support KPublicTransport Public transport data querying API KSMTP SMTP Library KTnef An API for handling TNEF data Libkdepim KDEpim Library Libkleo Kleopatra certificate management library Libksieve Sieve Script Library Mailcommon MailCommon Library MailImporter Mail Importer Library implements importing of emails from various other email clients MailTransport Manage mail transport Messagelib Messagelib Library which contains MessageComposer, MessageCore, MessageList, MessageViewer, MimeTreeParser, TemplateParser and WebEngineViewer Pimcommon PimCommon Library which contains PimCommon, PimCommonAkonadi Other md4qt C++ library for parsing Markdown Kirigami Addons Add-ons for the Kirigami framework Alkimia API Alkimia API documentation Baloo Widgets Widgets for Baloo Futuresql Non-blocking database framework for Qt KAsync API to build composable asynchronous tasks KCDDB KCDDB Library KCGroups Control cgroup resources through systemd dbus interface KCompactDisc Library for interfacing with CDs KDcraw A thread-safe wrapper around libraw KDEGames Common code and data for many KDE games KExiv2 Wrapper around Exiv2 library to manipulate picture metadata as EXIF and XMP KHealthCertificate Digital vaccination, test and recovery certificate parsing KMyMoney Plugin API KMyMoney Plugin API documentation KompareDiff2 Library to compare files and strings KOpeningHours OSM opening hours expression parser and evaluator KOSMIndoorMap OSM indoor map QML component KQuickImageEditor QtQuick plugins for image editing UI Krita Scripting API for Krita KSane SANE Library Qt-based interface KSaneCore Qt interface for the SANE library for scanner hardware KStars KStars is free, open source, cross-platform Astronomy Software. KTextAddons Text addons (autocorrection, text to speak, grammar checking, text translator, emoticon support, custom editor, autogenerate text) KUnifiedPush UnifiedPush client components KWeatherCore Query weather data LibKEduVocDocument libKEduVocDocument is a library for reading and writing vocabulary files used by Parley, Kanagram, KHangman and KWordQuiz LibKmahjongg For loading and rendering of Mahjongg tilesets and associated backgrounds Marble Marble framework, a library for maps, virtual globes and world atlases Okular Okular, the unified document viewer Perceptual Color GUI components for choosing colors, with focus on an intuitive and perceptually uniform presentation Phonon Phonon, the Qt multimedia abstraction library Plasma Wayland Protocols Provides the xml files of non-standard wayland protocols used in Plasma PolkitQt-1 Qt wrapper around polkit-1 PulseAudioQt Qt bindings for libpulse Qt Accessibility Client Accessibilty tools helper library, used e.g. by screen readers QXmpp A cross-platform C++ XMPP client and server library KChart A library for creating business charts KGantt A library for creating Gantt diagrams