1 looks like an Echeveria or Aeonium ... sorry I can't tell from the photo

2 Sedum rubrotinctum

3 Crassula tetragonia

:o)

Looks like Echeveria to me as well, but the second one I think is Sedum pachyphyllum rather than rubrotinctum, though they are similar, its just pachyphyllum only has those red dots at the tips, whereas rubrotinctum has a good bit more red in other places.

such a pity we can't grow the 1st and 3rd here at the tropics. i learnt that these need full sun (less the heat) and cool nights. we don't have that. the entire crassula family can't be grown here at all