Here are some more:
Pit
Perpetual Commotion
Mille Bornes
Jungle Speed
Tribond
Trivial Pursuit
FLUXX! (Can’t believe I forgot this one on the first time around–this is my favorite game!)
Sam2: lol, also through a friend. Though I have other friends that own it too. It is a very good game, one of my favorites. And if you like Quelf, you should definitely try Fluxx. ^_^
Also, when we play Settlers on Shabbos/YT we don’t use the puzzle border, and we space out the board tiles. The game comes with little replacement harbor tiles to use instead of the border.