They are Black Hungarian Peppers. I’ve actually never had one before but they are supposed to have about 75% of the heat of a jalapeño but with a sweet fruity flavor. If I can get them to produce should make a nice pepper sauce.
Discussion
Just back into civilization, peppers looks great, I find they don't need huge amounts of water, maybe once a week once their third set of leaves show. If you forget about them and water sporadically they will thrive and get a bit spicier.