That blog about photo workflow and software used is indeed interesting. I've read there before, Riley Brandt likes to propagate the usage of Linux and open source software whereever possible.
Thanks titan for mentioning nomacs, looks promising. In my windows days, I used XnView for browsing/viewing/(batch-)converting through my image collection. There is now a crossplatform version called
XnViewMP (.deb on hand), and the converting part is also available standalone as
XnConvert. BTW, does someone know if the 'rotation' part in nomacs is 'lossless jpeg rotation'?
For dolphin + servicemenus I used
kim earlier after spacepenguin mentioned it once in the forum. I always thought that dolphin and gwenview need kipi-plugins to achieve their stuff (but I may be totally wrong), and from the debian page for the
kipi-plugins they announce it partially ported to Qt4/KDE4, which does not look promising for Qt5/Plasma5. But maybe I miss something or I don't know that it's replaced by some package...