Goblin camp is inspired by few games. As author himself noted: "Goblin Camp is a roguelike citybuilder, inspired by Anno 1404, Dwarf Fortress and Dungeon Keeper."
Its still in relatively early stages of development but very playable. Its notably user-friendly (menus, hints, mouse, shortcuts) and pleasure to play (not like many other geek open source making-it-for-myself projects)
Here you can read about author's future plans: http://www.goblincamp.com/future-plans/
Its worth noting that ASCII graphics are only default. From version 0.14 it fully supports tilesets. Default tileset is included and settable in game options without improvisations.
There is a multi-part video tutorial on how to play.
And here are two screenshots from my game:
I am not in any way affiliated with author of this project (outside of being a member on his forum).