In the last years, video games have made popular the term "procedural generation" – and this is how it works at its most basic levels: a system where you have certain rules and frameworks, and a big database to draw from and fill the blanks.
Ben Overmyer's Iron Arachne is an excellent RPG resource site. It's a toolkit of generators with RPGs in mind, either generic fantasy or sci-fi, and some specific games in mind like Stars Without Number.
You Lethargic Weed, you Flaccid Politician, you Vain Trash-heap and you Greasy Houseplant!
Don't roll randomly to see what the weather is -- weather isn't random, not usually.
NeverEnding, which offers free and paid-for options, lets gamers or anyone else who needs illustrations of characters create their own.
The Goblinfinite app puts together goblins for you at a click of a button. Don't like the gobbo? Sacrifice it and get another. It's what every dark wizard would do.
Geek Native has a prophecy generator and, to be fair, it’s one of very many out there. There’s something fitting about the Doom Quest from momatoes, though. For a start, there’s that vanity URL doom.quest.…
You can just keep scrolling down the frame and the generator will keep suggesting new items.
Even in a sleepy village on the quiet corner of a fantasy map, it need not be the case that every day is the same. A GM or worldbuilder can insert a fantasy festival to shake things up a bit.
There's no doubt that the Fantasy Town Generator is equally as impressive as it is helpful for GMs (and perhaps even authors).