I got these cacti's and succulents a while ago and have been trying to ID them, but I seem to be no good at this. So can anyone give me a little help? Especialy for the one on the far right because as you can see one of leaves (?) has fallen off and died.
I'm no cactus expert but I have a plant exactly like your number one, it is a warty/soap aloe, scientific namegasteriaverrucosa. Try this site: http://aggie-horticulture.tamu.edu/interiorscape/indexcommon.html. Good luck on the rest!