2017-01-11 It wasn't as easy as I thought, finding a free icon set. It ac- tually took me quite some time, searching the web. Eventually, I settled with the Blueberry Basic icon set by Andrew Zhebrakov, which is in the public domain. [0] Great to read this statement about free content. [1] I would not have used any commercial icon set or even a free one with a license that requires a lot of Permissible Restrictions [2] They are appropriate IMO for some (large and selfstanding works) but they are only restricting and thus no-gos for stuff like icons. IMO there is no one true answer to licenses, but only appropriate choices for different cases. [0] http://www.icojam.com/blog/?p=259 [1] http://www.icojam.com/blog/?p=365 [2] https://freedomdefined.org/Permissible_restrictions http://marmaro.de/lue/ markus schnalke