The one in the top pic that is green and kind of curly looks like an A. gypsophylla. Can't be sure but that is what it looks like to me.
Did well for me in zone 9B Low Sonoran Desert, AZ. Is a pretty deep emerald green and will turn a purplish-red-brown when stressed. Oh yeah...crispy brown too in AZ summers.
Since our climates are so radically different I would ask those with more expertise about the care.
The plant in the middle, yellow and green variegated, I do not know and can not guess. Sorry.
The cream and green variegated on to the right in corner in the first picture, looks to be an A. americana medio picta. In terms of century plants the A. americana medio picta is on the smaller-ish side and will grow its stalk approximately 10-15 years into its life cycle. Takes heat well when mature. Grows relatively slow and will sucker. Had mine a little over 1.5 years and each plant has produced 2 babies to give you an idea.
Again these are just my guesses not positive I.D.'s . Hopefully others will chime in with more definitive answers. Please bear in mind my information is based on experience in zone 9B.
As for the plant in the second pic.
When you find out what it is let me know! I'd love one of these for myself! Most excellent. BTW here's a pic of my A. gypsophylla and A. americana medio picta.
Have a good day.
This is A. gypsophylla
Closer view of the plants. These are about 1 year old.