Thanks everyone for your comments. Using CUPS is not really a problem but for printing anything of significance I will likely use someone else.

Slackware 14.2 is installed on a bunch of machines here, and Darktable has a build for that distribution. I am aware that I can use PS with WINE on linux, and have done that in the past. But I am ideally looking for open source solutions.

I have several 4k TVs which are connected to Slackware boxes, and while using a TV, as opposed to a monitor, is not ideal, it gives me lots of space, and in the case of 4k drone shots it allows me to view in the native resolution on the computer. For critical work, such as someone doing pro work, the TVs fall short on color stability, among other things. But they are cheap.

Finding something suitable for the Android tablet appears to be more of a challenge.

Good pointer. That one was not on my radar.

Looking for recommendations for post processing software to use on an Android tablet.

Additionally, I am looking for the same to run on Linux.

Further complicating things, I take stills and also have drone video. My higher priority right now is the stills.

I know most everyone uses Windows or Mac systems, but there are some different people out there...

Thanks.