Looks like Oscularia deltoides.

Hi Julie, I'm sorry I can't suggest what this is, but I don't think it's a Peperomia. I've grown several over the last few years & in my experience, the growth habit is either in clusters (from a central clump like a loose rosette) or leaves in pairs. I personally don't know of a Pep which has alternate leaves like that. Of course it could be such exists & I've not run across it yet, but I think it's something else. Whatever it is, those leaves are quite pretty w/ that distinct veining, VERY nice.

A Kalanchoe, looks most like K. crenata to me, as far as what I can see. Where did you get it? If it blooms, please come back & post another pic. =)

Is a crassula, but I know little about that genera, other than jade plant..