The "spiky" one on the left is Euphorbia susannae, next to it is Crassula argyrophylla, and the one that looks like a little rose is Aeonium dordantale if I remember correctly.
That one is a Whitesloanea crassa - kinda similar to pseudolithos that I love very much, but completely suck at growing, so they get deformed or just straight die on me more often than I'd like to admit... :(