The images shown in the section “free pictures” are available under the Creative Commons license “Attribution-No Derivative Works” . The illustrations can be used free of charge also for commercial purposes. However, the illustrations are not free of rights, the usage is permitted under the following conditions:

By using our Illustrations you accept this license agreement. You can find more informations about the Creative Commons license here.

Here are examples of two possible forms of citation of the author and license:

correctly attibution for cc image use - caption
correctly attibution for cc image use - reference

If you use the illustration onliine we would appreciate a link to our website “”.

If you are interested in a usage beyond the above license model, please visit our Gumroad-Store (external link). Here you can license images in high resolution, without our logo and attribution.