Echeveria 'Perle von Nurnberg'

Melissa, It appears to be a Graptopetalum paraguayense, or has some in it (there are lots of hybrids). There's a lot of information here already written on rooting cuttings (use the search box at the top of the main Cactus and Succulent Forum page), but basically, no water except for misting the cutting, the cut end slightly inserted in the soil, lots of light (eventually full sun, but not yet), warmth, air movement and it should be growing in a month or so.

Left plant could be Echeveria shaviana or another frilly type (Neon breakers is another I can think of right now). They supposedly get more frilly in great light. IIRC, Neon breakers could get more colorful, with pinkish-reddish margins. The middle plant could be E. gibbiflora metallica, or PvN as you suggested - they could look very similar. I am not sure about plant on right. I see plastic liner - make sure there are drainage holes in it. Give plans great drainage, good sunlight and hopefully they grow to be easier to ID.

I have two succulents I can't seem to identify. The first, more compact one I've had for about a year and it's only recently started to grow new leaves and get a bit of a reddish tone on the leaf undersides. The leaves themselves are semi-tubular. The taller one I've had a few months ago and it seem to be growing quite quickly and has rather long flat leaves.