Scientific name: agave attenuata
Agaves are a large genus of plants from Mexico. They are very hardy, with a distinctive spiral of large, pointed leaves. The agave in the picture is one of the most common varieties of agave, agave attenuata.
Scientific name: aloe vera
Aloe vera is a type of succulent plant, suited to arid regions. The plant is supposed to have many medicinal properties, and you often see aloe vera added to tissues - the aloe are supposed to stop your nose getting red if you have a cold and blow your nose a lot. Aloe vera is meant to be very good for your skin, and it helps burns heal faster.
Scientific name: Crassula ovata
Scientific name: Sedum rubrotinctum
Jelly bean plants are a very easy to grow succulent that has leaves that look like jelly beans. You can grow a new plant from a single leaf of a jellybean plant. These plants can tolerate most conditions, including drought and frost.