Here is a number of sample reports that have all been created with KNIME Report Designer.

This example report shows some of the different chart types that are available in the KNIME Report Designer. The resulting report as PDF.

Sample report created for a customer in the financial sector. The data is taken from a large set of different data sources. The resulting report as .pptx.
This report shows the integration of chemical structure representation. The structures are included as images and cannot be edited. The resulting report as PDF.