• Vision: you have it (probably).
• Infravision: can see body heat in darkness (or all the time if you don't have Vision). No luck with cold objects. Attenuates normally (in other words, your sight doesn't have a max range, but normal distance modifiers apply to Perception)
• Echolocation: use ultrasound to sense edges in total darkness.
• Ultravision: can see ultraviolet light. Not always useful, but certain otherwise dark environments might have some of this.
• Vital Sight: sense life and undeath, regardless of heat signature. Can tell them apart. Magical in nature. (Many undead have this)
• Magical Sight: sense magic itself. Can sometimes use to see magical signatures on otherwise invisible subjects.

No such thing as generic "darkvision".

• Hearing: Normal, human hearing. Can locate invisible subjects with Perception.
• Sonar: Similar to echolocation, but operating in a denser fluid medium (i.e. water).

• Scent: Natural, powerful scent (roughly equivalent to a dog). Humans don't have this. Can locate invisible creatures in short range who are not moving (narrow down to a square). Can track over long distances.
• Super-Scent: Blindsense in a given radius, based on scent. (Dragons have this)

• Tremorsense: Blindsense in a given radius, based on sensing ground vibrations. Varies based on ground composition; doesn't work if you aren't on the ground, or what you're sensing isn't making any vibrations. (Dragons have this)

• Insight: Blindsense based on telepathic sense. Doesn't work on mindless creatures.