Acid Generation: the ability to generate an acid for external use via sweat, spit or by any other biological means.

Acoustikinesis: the ability to manipulate sound or in other ways use sound as a tool.

Aerokinesis: the ability to control air and create gusts of wind; also enables them to move objects or other people with the wind or create a dome of air pressure to deflect attacks.

Atmokinesis (Weather Manipulation): the power to psionicly control the weather in a wide range of distances.

Botanopathy: the ability to communicate with plant life, possibly stimulating rapid growth or directing motion.

Chronokinesis: the ability to slow, stop, or otherwise manipulate time itself.

Cryokinesis: the ability to generate or manipulate ice and cold.

Death Touch: can cause near-instantaneous death by simply touching another person.

Duplication: the ability to create duplicates of themselves.

Electrokinesis: the ability to create and control electricity

Energy Absorption: the ability to physically absorb one or more types of energy, be it kinetic, psionic, electromagnetic, thermal, magical, as well as "life energy".

Energy Manipulation: the ability to direct, control, absorb and release multiple forms of energy.

Geokinesis: the ability to manipulate the land or ground. (Does not extend to control of plants.)

Gravitikinesis: the ability to manipulate gravity

Healing Factor: the ability to recover from bodily injuries or disease at a superhuman rate.
Disease Immunity- This provides him/her with highly efficient immune system, which renders them immune against all known diseases and infections.
Foreign Chemical Immunity- This affords the character with virtual immunity to poisons and drugs.
Insulated Weather Adaptation- Their body is highly resistant to certain elemental extremes such as extreme heat or cold.

Hydrokinesis: the ability to manipulate water and possibly other liquids

Intangibility: self-expanatory

Invisibility: the ability to render themselves invisible to various means of detection. This is usually visual, though a character could become invisible in other spectrums, such as infra-red or x-ray. Does not include invisibility by means of telepathy.

Magnetokinesis: the ability to manipulate magnetic or electromagnetic fields and control molecular polarities or various metallic items.

Matter Manipulation: ability to consciously manipulating inorganic, and sometimes organic, matter at the molecular, sub-molecular, atomic, or sub-atomic scale.

Molecular Acceleration: the ability to accelerate the motion of molecular matter via physical contact (generally by the hands), resulting in a catalytic increase in the heat of the object. This can be used to turn normal objects into superheated projectiles or to melt things with one's hands. This can even be used to set things on fire or burn objects.

Organic Bodily Forms: the ability for one's body to take on another material property. This may only be skin-deep. For example, Colossus has an organic steel shell when he transforms and Emma Frost turns her whole body into an organic diamond form.

Photokinesis: the ability to create or manipulate light.

Power Mimicry: the ability to reproduce the superpowers of others

Power Negation: the power to disable the powers of others, either temporarily or permanently, or characters with the power to deflect, reflect or become otherwise immune to the powers of others. Does not include genetic immunities between family members, like Cyclops trying to blast Havok, or opposing negation, like Iceman trying to make an object freeze while Human Torch tries to make it burn.

Probability Manipulation: the ability to alter probability, causing unlikely things to happen or likely things to not happen

Pyrokinesis: the ability to excite the atoms within an object, possibly enough energy to ignite the object. A pyrokinetic is a person capable of generating flames from thin air, not requiring the consumption of oxygen or combustible objects to maintain the flames. They have been seen being able to increase the temperature in their proximity, create flames, and endure extreme heat and flame without being harmed.
Blazing Bolts- the ability to project blazing bolts, destructive, incinerating long-range beams of fire from any part of one's body at will (They could be able to blow reinforced, solid titanium walls without effort).
Burning- the ability to burn, scald, singe, scorch, vaporize, evaporate, and incinerate virtually any being or object by touch. [This is sort of a 'duh' thing]
Fire Absorption- the ability to absorb any amount of flame into his/her body harmlessly.
Fire Breath- the ability to project his/her fire from his/her mouth by breathing and exhaling at will, like a dragon.
Fire Extinguishing- the ability to extinguish any fire in his vicinity mentally.
Fire Projectiles- the ability to make constructs out of flame (fireballs being the most common) and hurl them at opponents. Also includes shooting a steady stream of fire from the hands.
Fiery Projections-  the ability to generate, project, and create virtually any shapes, objects, constructs, weapons, and even beings composed of fire from any point on one's body.
Firestorms- the ability to summon a firestorm that can cover great distances, from an acre to over a fifty thousand-mile radius.
Flight- a character's body and plasma could possess a high hydrogen content, and could be surrounded by an exuded cloud of mono-atomic hydrogen atoms. This hot cloud could provide sufficient positive buoyancy for him/her to float. With mental stimulation of his/her flame, he/she could provide enough lift to carry an undetermined amount of weight that could be greater than one could normally carry. By forming a jet from his/her feet, directed behind him/her, one could achieve supersonic speeds of up to at least 300 miles per hour.
Pyrokinesis- the ability to telekinetically control and manipulate any fire or flame, even ones one did not manufacture, and utilize them in any way imaginable. One could possess complete and precise control over their shape, size, intensity, density, temperature, and even color. He/she could alter its size and intensity from a mere candlestick flame, to an immeasurable inferno. He/she could telekinetically manipulate any fire or flame to do whatever he/she desires.
Spontaneous Combustion- the ability to spontaneously combust and/or engulf any portion of or all of oneself in fiery plasma without harm to oneself whatsoever.
  Welding and Fusing- the ability to control his flame to perform the most delicate welding jobs. He/she can fuse craters, holes, or openings in walls, floors, ceilings, or the ground.

Shapeshifting: manipulate other people's minds easily, achieving a variety of effects.
Metamorph- limited to human forms, unable to change mass
Animorph- taking on animal forms. May be able to take on the abilities of the altered form
Polymorph- assume any form, size, mass and appearance at will
Liquification- ability to turn partially or completely into a liquid
Sublimation- ability to transform into a gaseous, mist, or fog-like form

Size Alteration: can cause themselves or others to grow or shrink. This may or may not be be accompanied by an increase or loss in mass.

Superhuman Speed: self-explanatory

Superhuman Strength: self-explanatory

Technopathy: the ability to mentally communicate with and control electronic machines.

Telekinesis: the ability to manipulate and control objects with the mind without physically touching them, especially over long distances. Depending on the user's skill and power, they may be able to levitate themselves and other objects (including heavy objects), and form protective shields.
Bio-Blasts- the ability to fire enormously powerful energy blasts which are generated from the body's extrasensory potential.
Biophysical Control-  the ability to control living organic tissue, causing muscles to cramp, skin to break, or blood vessels to burst or contract.
Concussive Blasts- the ability to project psychokinetic energies as powerful blast beams directed from the brain that could apparently affect matter with concussive force.
Flight- by levitating themselves, users can "fly" for very long distances and at varying speeds.
Force Fields- the ability to create protective force shields that could detect even the most powerful of attacks (even filter bacteria from the air). There does not appear to be any correlation between field strength and the thickness of the psychokinetic fields.

Telepathy: the ability to transfer information from one mind to another and to read mind and thoughts to humans and animals without the aid of physical communication (noise or movement).
Telepathic Defense
Telepathic Illusions- the ability to create realistic telepathic illusions and cause people to experience events which are not actually occurring.
Telepathic Manipulations- the ability to manipulate other people's minds easily, achieving a variety of effects.

Teleportation: self-explanatory