# 2 I think looks like a form of Epiphyllum
sp. So I assume # 1 is also. There doesn't seem to be many species of Epiphyllum available, so when it flowers you'll be able to tell.
There's haworthia in the last pic - the barred one is H. fasicata
(sp?) and the other one is possibly H. margaritifera.
As you know I am very new to this game, so if I get them right it's pot luck!