kdelibs includes libraries that are central to the development and
execution of a KDE program, as well as internationalization files for these
libraries, misc HTML documentation, theme modules, and regression tests.
Here is an alphabetical list:

* dnssd
    Interface to the DNS-SD (Zeroconf) support.
* interfaces
    kparts interface for text editors, mediaplayer and scripting.
* kate
    KPart for 'kate', the KDE advanced text editor.
* kcmshell
    KControl Module interface
* kconf_update
    Auto-Updater for config files.
* kde3support
    Libraries that were part of KDE3, but have been replaced for KDE4
* kdecore
    This is the core collection of KDE stuff. Non GUI classes reside here.
* kded
    The KDE daemon checks for newly installed software, update files
    or hostname changes and takes according actions.
* kdesu
    Library for password entering and handling
* kdeui
    The main collection of misc. user interface classes (widgets).
* kdewidgets
    For developers: KDE's custom widgets for Qt Designer.
* kdoctools
    Contains mostly stuff convert XML docbook files via XSLT into
    human readable stuff.
* khtml
    The next generation HTML rendering widget designed for Konqueror.
* kimgio
    An all purpose extension to the qimgio class that supports various
    image formats.
* kinit
    Process launcher (kdeinit), used for fast KDE startup and to launch
    kioslaves.
* kio
    Classes that fetch and decode URLs are contained here. This library
    also contains "ksycoca", the system configure cache containing
    services, applications, servicetypes and mimetypes.
* kioslave
    I/O subprocesses to handle files, ftp, http, gzip and bzip2 streams.
* kjs
    Implementation of ECMAScript (aka JavaScript).
* kjsembed
    A binding of the ECMAScript language to interface with KDE code.
* knewstuff
    Allows applications to easily download data from the Internet to add
    new information to the program. e.g. wallpapers, translation packs, etc.
* knotify
    Handles user notifications, including sounds, logging to files, etc.
* kparts
    KDE component model.
* kwallet
    Client and backend to store values in encrypted files.
* mimetypes
    Database of mime types.
* sonnet
    Tools for natural language processing, including spell and grammar
    check. Includes gui widgets.