Probably my favorite type of game, I've played dozens of them but I'm always looking for something good I might have missed. My personal favorite for the past few years has definitely been Farthest Frontier but theres been a ton of good ones. And if anyone else is looking for recommendations let me what you like and I probably know something that fits.
The main mod is Augustus - it stops your people from wandering too far, so now your firefighters and laborers will go where you want them.