KOffice is an integrated office suite built on the KDE platform.
It utilizes free and open standards like OpenDocument for its document formats, component communication and component embedding.
It contains:
KWord, an intuitive word processor;
KSpread, a fully-featured calculation and spreadsheet tool;
KPresenter, a powerful and easy to use presentation application;
Kivio, for diagramming and flowcharting;
Karbon, for drawing vector graphics;
Krita, a creative sketching and painting application;
KPlato, a project management application;
Kexi, an open source data management application.