Small and spiky tower
This plant is small, and a very concentrated green. The different sections are stacked on top of each other like a tower. The points have very sharp spikes on them.
Drought Smart Plants reply:
This looks most like a type of Aloe, of which there are many species and varieties. They are such appealing plants that some people will collect every single one of them.
Some have a small spine at the end of the leaves, and most have either serrated edges, or they can be quite well armed with tiny (or not so tiny) thorn like projections along the edges.
However, the main difference between Aloe and Agave is the sheer size and ferocity of the spine at the end of the leaf.
If it's an Agave, you will recognize it because you literally cannot handle these plants without getting wounded. Aloe, on the other hand, tend to be less assertive, just looking more dangerous than they really are.
Look on the page about Aloe succulent plants to see more pictures, and for more about how to care for them, check out this page: Aloe plants.
Compare your plant to these Agave.
Find out more about succulent care here.
Happy Succulent Growing!