Thanks so much for the very informative answer! I had heard of some of these things, and it's great to hear of some more and also some real world experience and comparison.
I'm unfamiliar but interested in this kind of thing, and I'm wondering if anyone here has an idea why some things that seem similar (at least to inexperienced me) have different prices.
E.g. why Mattermost from $2.70/month but Rocket.Chat from $4.00/month?
Yeah, the last time I tried out Gimp, the menus had so many options, they didn't even fit on my screen and I had to scroll up and down just to see them all.
I've heard of a Gimp mod called Photogimp that makes the UI more like Photoshop. I wonder if it would be possible for someone to make a "Basicgimp" mod, where, by default, the UI only contains the basics needed for meming, and the rest could be turned on/off ticking a box for "Full UI".
Thanks for the details.