Krita is a creative application for raster images. Whether you want to create from scratch or work with existing images, Krita is for you. You can work with photos, scanned images or start for a blank slate. Krita supports most graphics tablets out of the box.
Karbon is a vector drawing application with an user interface that is easy to use, highly customizable and extensible. That makes Karbon a great application for users starting to explore the world of vector graphics as well as for artists wanting to create breathtaking vector art.
Kivio is an easy to use diagramming and flowcharting application with tight integration to the other KOffice applications. It enables you to create network diagrams, organisation charts, flowcharts and more.
Dia is roughly inspired by the commercial Windows program Visio , though more geared towards informal diagrams for casual use. It can be used to draw many different kinds of diagrams.
Skencil is a Free Software interactive vector drawing appliction. Known to run on GNU/Linux and other UNIX-compatible systems, it is a flexible and powerful tool for illustrations, diagrams and other purposes.