HUMANS/NEAR HUMANSNear humans are beings that have a drop or two of non-human blood, but aren't obviously half breeds.
Mundanes. Mundane humans have no powers or abilities. They were born to human parents and, unless something dramatic happens in their life, they do not know that the Sidewise exists.
Psychics. Psychics are humans or near-humans who have, through birth or accident, acquired the ability to do exceptional things. Some of these abilities are small; lesser psychics might have minor abilities like the power to create a small flame, to communicate silently, to tell if people are speaking the truth, or to levitate small objects. Other abilities might be much more dramatic. Greater psychics might have a suite of powers related to emotion or thought, or might be able to fly or teleport. The thing they all have in common is that their powers are innate, and require no external elements. Sometimes, over time, these powers grow or develop.
Magicians. Magicians (also sometimes called witches, wizards, mages, or a dozen other names) are humans or near-humans who have acquired magical abilities through learning. Most creatures are born with the ability to do prop-based magic, but it takes a specific kind of mind and focus to learn how to use it. Those who have studied and learned how to hone their skill are able to use herbs and other ingredients along with incantations to create magic. Often, they have a book to keep track of what spells have worked for them and what haven't. Those who have been practicing for longer tend to be more skilled.
Magical Items. Some humans or near-humans may find magical objects or familiars that gift them with special abilities. These could include weapons, wands, armor or clothing items that attune themselves to their owners to give them minor to major magical power.
Curses. It's possible that if a person crosses the wrong creature, they may end up cursed. Naturally, curses will result in problematic effects for their victims. Somehow, though, they also give magical abilities or other supernatural elements that can be used to a person's advantage.
High Technology. While it's not magic, of course there may be people in this world who have far surpassed the standard technology of the era to create fantastic machines, or to augment their bodies, or a hundred different things.