These have become quite popular in GNU/Linux resulting in the
http://themes.freshmeat.net web site as a central repository.
Copyright © 1995-2019 Togaware Pty Ltd
Support further development through the purchase of the PDF version of the book.
Brought to you by Togaware and the author of open
source software including Rattle and wajig.
Also the author of Data Mining with Rattle and Essentials
of Data Science.