KAlgebra is a calculator that lets you plot different types of 2D and 3D functions and to calculate easy (and not so easy) calculations, such as addition, trigonometric functions or derivatives.

Analitza is a library to work with mathematical objects. It adds mathematical features to your program, such as symbolic computations and some numerical methods; for instance the library can parse mathematical expressions and let you evaluate and draw them.

LabPlot is a tool for interactive graphing and analysis of scientific data. It provides an easy way to create, manage and edit plots and to perform data analysis.

Marble is similar to a desktop globe. At closer scale it becomes a world atlas, while OpenStreetMap takes the user to street level. It supports searching for places of interest, viewing Wikipedia articles, creating routes by drag and drop and more.

This package provides a QtQuick plugin to render beautiful and interactive charts.

Gcompris offers a large collection of educational games for small children, designed to be a unified interface to integrate more educational games. Language-oriented games contain vocabulary, sounds, and voices for many different languages. Currently available boards include:

1. learning how to use a mouse and keyboard

2. learning simple arithmetic

3. learning how to read an analog clock

4. recognize letters after hearing their names

5. reading practice

6. small games (memory games, jigsaw puzzles, ...)

KTouch is an aid for learning how to type with speed and accuracy. It provides a sample text to type and indicates which fingers should be used for each key. A collection of lessons are included for a wide range of different languages and keyboard layouts, and typing statistics are used to dynamically adjust the level of difficulty.

Sonnet is a plugin-based spell checking library for Qt-based applications. It supports several different plugins, including HSpell, Enchant, ASpell and HUNSPELL.

KItemViews includes a set of views, which can be used with item models. It includes views for categorizing lists and to add search filters to flat and hierarchical lists.

Kdeinit is a process launcher similar to init used for booting UNIX. It launches processes by forking and then loading a dynamic library which contains a kdemain(…) function. Using kdeinit to launch KDE applications makes starting KDE applications faster and reduces memory consumption.

KArchive provides classes for easy reading, creation and manipulation of archive formats like ZIP and TAR.

It also provides transparent compression and decompression of data, like the GZip format, via a subclass of QIODevice.

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

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).

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.

This framework contains scripts and data for building API documentation (dox) in a standard format and style for KDE.

For the actual documentation extraction and formatting the Doxygen tool is used, but this framework provides a wrapper script to make generating the documentation more convenient (including reading settings from the target framework or other module) and a standard template for the generated documentation.

Provided are action classes that can be added to toolbars or menus, a wide range of widgets for selecting characters, fonts, colors, actions, dates and times, or MIME types, as well as platform-aware dialogs for configuration pages, message boxes, and password requests.

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.

KDESU provides functionality for building GUI front ends for (password asking) console mode programs. kdesu and kdessh use it to interface with su and ssh respectively.

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.

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

Attica is a Qt library that implements the Open Collaboration Services API version 1.6.

It grants easy access to the services such as querying information about persons and contents. The library is used in KNewStuff3 as content provider. In order to integrate with KDE's Plasma Desktop, a platform plugin exists in kdebase.

The REST API is defined here: http://freedesktop.org/wiki/Specifications/open-collaboration-services/

KItemModels provides the following models:

1. KBreadcrumbSelectionModel - Selects the parents of selected items to create breadcrumbs.

2. KCheckableProxyModel - Adds a checkable capability to a source model.

3. KConcatenateRowsProxyModel - Concatenates rows from multiple source models.

4. KDescendantsProxyModel - Proxy Model for restructuring a Tree into a list.

5. KExtraColumnsProxyModel - Adds columns after existing columns.

6. KLinkItemSelectionModel - Share a selection in multiple views which do not have the same source model.

7. KModelIndexProxyMapper - Mapping of indexes and selections through proxy models.

8. KRearrangeColumnsProxyModel - Can reorder and hide columns from the source model.

9. KRecursiveFilterProxyModel - Recursive filtering of models.

10. KSelectionProxyModel - A Proxy Model which presents a subset of its source model to observers

The Package framework lets the user install and load packages of non binary content such as scripted extensions or graphic assets, as if they were traditional plugins.

KConfigWidgets provides easy-to-use classes to create configuration dialogs, as well as a set of widgets which uses KConfig to store their settings.