I don't know what they are. However you can check out thetortoisetable.org and look them up by name or color to see if they are safe. There are other sites too, I just don't remember them.
The fourth is mother of millions. Toxic, from what I recall. The last is aptenia. It is edible.
I think the second one is dudleya, which is edible.
Edit: Yes, mother of millions is highly poisonous to grazing animals. I know endo/ecto can have different reactions to different things, but I would definitely avoid.
The first picture shows begonia - edible
Second - I don't know the name of this succulent
Third - ?
Fourth - Kalanchoe (Mother of thousands) toxic
Fifth - a type of echiveria - edible
Sixth - Aurora Borealis Kalanchoe - edible
Seventh - Not sure of its official name, but its something like red apple ice plant - edible
2 looks like some sort of crassula...i don't think it's a dudleya as they have a tighter rosette shape, generally
seventh is indeed red apple/aptenia
I have no idea about the 3rd one...from it's leaf and flower structure it may also be some sort of kalanchoe, but it's hard to say: i've never personally seen this one
I was thinking maybe dudleya edulis, because I see a lot of that down here, rather than the more common rosette type. Usually that comes more directly from the ground though. It may be a crassula. I have seen the third before, but I can't identify it. I'm better with natives than the general succulents. So many variants.
Aptenia is ubiquitous though. Ours is out of control so everyone will probably get a treat this week.
Edit: I'm leaning toward kalanchoe on the third one also.