A dark room & candy box
Couple of web-browser-based games I discovered recently: a dark room and Candy Box (and its sequel Candy Box 2). Second one is browser RPG with resource (candies!) management part, fun quests and actually good ASCII art graphics.
First one starts as village management sim in post-apocalyptic world and at some point become almost a roguelike RPG (with map, battles and everything). Gives good post-apocalyptic feeling.