The first one is a complete mystery to me... It has really sprouted recently. The second is what I think is an Echeveria or Dudlya. I only have one. It is almost white with a yellowish undertone. I'd love to have a few more. I forgot about it until I was suprised to find it in the front yard yesterday while weeding.
Excuse my ignorance but I think that the first one is like one I have that almost died in the freezing weather and the name tag says: "Senecio Sp." The only difference is that the individual leaves are a little more slender. Xuling
The Echeveria could by E lilacina, one of my favorites. It's a little hard to be sure without an idea of the scale. Some smaller Echeveria spp look similar, too. Or hybrids. But I'd start there. It's not a Dudleya sp.