KOffice is the document processing suite from the KDE project.

http://koffice.org/

[edit] KOffice Plugin Tutorials

KOffice Overview

This document shows an overview of the different KOffice plugin types and tells you what each of their purpose and strengths are. If you are new with KOffice plugins, this is the place to start.

Creating KOffice Flake Plugins

This tutorial shows you how you can build a plugin for KOffice applications to allow you embed content in ODF documents using Flake.

KWord Scripting

This tutorial shows how to script KWord with Python, Ruby or JavaScript using Kross.

KSpread Scripting

This tutorial shows how to script KSpread with Python, Ruby or JavaScript using Kross.

Krita Scripting

This tutorial shows how to script Krita with Python, Ruby or JavaScript using Kross.