KConfig provides an advanced configuration system. It is made of two parts: KConfigCore, KConfigGui and KConfigQml.

Ki18n is the KDE internationalization system for user-interface text. It enables localization of user-visible strings, including locale-aware argument substitution and formatting. Ki18n is built atop the widely used Gettext internationalization system, making the workflow familiar to both programmers and translators. It can be considered a Gettext-wrapper for code based on the Qt library, but it also provides additional functionality over basic Gettext.

Library to use/access icon themes & widgets in Qt. These classes are used by the iconloader but can be used by others too.

A simple implementation of the HTTP encrypted content-encoding

The (shared) Bobcat library contains classes and templates used by, e.g., the Stealth and Bisonc++ programs.

Python package can be used by a variety of people: