I ran across this link on facebook, of all places, and thought it might prove useful or at least entertaining to some of the members here.
Aw, fuck yeah.
Wæs se grimma gæst Grendel haten,mære mearcstapa, se þe moras heold
At work I can't check reddit, but it links to the 'procedural generation sub-reddit' which sounds like a place that would have a lot of cool stuff.
For gaming, I think pride of place goes to the link Fixxxer shared just for its combination of good-looking output with pure usefulness, but also of note are:https://bl.ocks.org/Azgaar/b845ce22ea68090d43a4ecfb914f51bd and https://mewo2.com/notes/terrain/, both of which are pseudo-random map generators that spit out good-looking semi-usable results. If I were going to add a continent to the Tolrea setting, the first one is where I would go first.
There's also a really neat blog at https://heredragonsabound.blogspot.com/ that is operated by a guy who who plays with the techniques that underpin these sites. He took the stuff from the second link and extended it considerably, and is full of insights about how and why randomized noise can be translated into shapes that our brains are inclined to think of as "natural-looking." This guy apparently uses D3.js (www.d3js.org), extended with various libraries and scripts that he lifted from the guy at mewo2.com.
Insofar as I can grok what's being done, the map-generation techniques these guys use are very similar to what I did to generate the bulk of the maps for Tolrea, except that they've automated those tasks and arranged for the outputs to be a great deal prettier. It's really impressive stuff, and I think I'd actually be prepared to pay real money to get that last guy to turn over his code, so I could try to make a mapping utility that I could run in a browser. I doubt that I have the cash for that, but I'm cautiously hopeful that he'll eventually offer a utility, either FOSS or paid. He's going to a lot of trouble, and I've no doubt that he realizes that it's a salable product.
This is fucking awesome!