Adriel

Angelic Possession - Similar to demons, angels require a vessel while on Earth. However, they must have the vessel's permission before they can take control. Gadreel states that even once they are possessed, the vessel can expel the angel at any time but this presumably does not apply for all angels.
Astral Projection - Angels can project shadowy forms of their wings onto surfaces at will. If one is killed by an Angel Blade, its wings are burned onto the surface on which they died.
Chronokinesis - Angels can travel through time, in either direction. They can also take others with them, and just send others without going themselves. However, this is a very difficult ability to master with or without Heaven's assistance. More powerful angels such as Seraphs or Archangels are able to manipulate time easier, even when cut off from Heaven, though it is still not an easy task.
Dream Walking - Angels can appear in people's dreams, they usually use this to communicate, when they can't find the person they're looking for, or want to talk privately. Lucifer was able to talk to his future vessels in their dreams.
Eidetic Memory - Angels have the names of every prophet who has existed or will exist etched into their memories. This ability also makes them aware of reality warping and timeline changes.
Electronic Manipulation - Angels can manipulate electrical appliances. Castiel caused a dozen car alarms to stop by raising his hand.
Immortality - Angels don't age and cannot be killed by diseases or Earthly weapons.
Invulnerability - To date, the only things capable of killing angels are Angel Blades, Holy Fire, a stronger angel, Death, God, and Leviathans. Archangels have even fewer weaknesses, as Michael wasn't killed by the  Holy Fire, and they can only be killed by Archangel Blades, though it's unknown if they can be killed by Angel Blades. It has been stated that Death's Scythe can kill angels.
Regeneration - If an angel's vessel is damaged, it will repair itself nearly instantly unless the wound was caused by angelic weaponry .
Sedation - Angels are able to render humans unconscious with a touch.
Smiting - Perhaps an angel's most versatile and terrifying weapon, smiting (sometimes known as the Killing Touch) allows the angel to kill any demon, monster and even humans with a touch. Smiting is often exhibited when angels place their hands or palms on their adversaries' face, forehead, or mouth.
Super Stamina - Angels never tire, and they do not require food, water, oxygen, or sleep to sustain themselves.
Super Strength - Once possessing a vessel, angels use their power to dramatically increase the physical strength threshold of their hosts. All angels are much superior to humans and animals in strength, however, their strength varies from angel to angel, depending on their position within the celestial hierarchy; lesser angels (cherubs, rit zien, and common angels) are just stronger than lesser monsters as well as average black-eyed demons, able to press at least 2 tons (4,000 lbs), while seraphs, mid-level angels, are considerably stronger, able to overpower stronger monsters, mid-level demons, and virtually all lesser angels. Finally, archangels are the strongest of all angels and are counted among the most physically powerful beings in existence, able to overpower all lesser and mid-level angels, top-level monsters, top-level demons, and even top-level pagan deities.
Super Senses - All angels enhance their vessels senses to superhuman level. Angels possess an acute sense of smell. Their sense of smell is heightened to the point where they can identify people by smelling their body, bone or by their blood. Angels can also identify people by sniffing their genes and hormones as well.  Because angels operate on a different plane of existence, they can see atoms and ions which are impossible for humans to see. Angels can hear a humans conversations miles away from them, and they are somehow able to locate any human on the planet and find them, but they can't locate people if they are protected by an Enochian charm or symbol.
Supernatural Perception - Angels are able to see almost all supernatural activity around them. Castiel could even see Reapers, which remain invisible except to those they are seeking. They can also sense any location, being, or object not protected by Enochian Symbols. This perception also extends to electromagnetic waves, and can decipher radio modulation signals, as angels are "multidimensional waves" in their true form and can thus perceive such energies.
Telekinesis - Angels are able to telekinetically move beings and objects with their mind. They are able to use this power in a more aggressive manner like demons, but are often not depicted as doing so.
Telepathy - Angels can read the minds of other angels with ease, higher angels such as Seraphs and Archangels can also read humans minds.
Teleportation - Angels are able to travel from one place to another, instantly, without occupying the space in between. They can also summon or send other beings.
Temporal Awareness - Angels are capable of becoming aware whenever any alteration occur within the time-stream, allowing them to discern alternate timelines and the like. With this, Angels like Castiel and a younger Uriel have identified other time-travellers in this manner.
Voice Mimicry - Angels can perfectly mimic the voice of mortals.
Protective Charm - An angel can protect an individual (commonly their future vessels) from most forms of physical damage. This degree of protection is linked to an angel's power. Castiel was able to prevent his vessel Jimmy Novak from burning his hand on a pot of boiling water as a sign of faith. Raphael was capable of making Crowley immune to Castiel's angelic killing touch.
Flight - All angels are able to fly, though it's only been shown when not in a vessel. It may be linked to their teleportation due to the sound of wings flapping when they teleport.
Pyrokinesis - Castiel displays the ability to burn through ropes holding him, even before he becomes a Seraph.

Holy Fire - Encased in flames created from Holy Oil, the angel is trapped. The trapped angel still can use their powers, possibly aiding them to escape. Touching the flame will kill the vessel and the angel. However, it cannot kill Michael, being only able to banish him.
Lucifer's Cage - Strong enough to securely contain normal angels and Archangels; it is currently holding the two strongest Archangels in existence, Michael and Lucifer. It is to be noted that Castiel was able to at least reach inside of the Cage to pull Sam out though he called the task "nearly impossible" and was only able to get Sam's body.
Enochian Sigils - When Enochian sigils are placed on human rib cages, they prevent any angel/archangel from detecting and finding them. They can also be used to prevent angels from entering a building by painting them on the building's walls. In Torn and Frayed, the sigils on the walls dramatically weakened Castiel's powers. They can also prevent an angel from hearing a conversation of those in a warded room.
Hex Bags - Hex bags can used to prevent angels from detecting and finding someone (these cannot hide someone from Archangels in vessels).
Brain Penetration - One of Crowley's demons was able to block at least some of Samandriel's powers by placing large metal spikes into his brain. They can also break into the angel's factory settings through this method.
Higher Demons / Large numbers of Demons- The highest Demons are able to fight, overpower, harm, banish, and even possess lower level Angels, they can't kill them though. A significantly large number of demons (even without hosts) are able to overpower a group regular angels as Crowley's army of demons was able to defeat Castiel's guards ("The Man Who Knew Too Much"). However, it is unlikely that numerical superiority plays any factor against the Seraphim and Archangels, as Castiel as a Seraph was effortlessly able to kill three demons in quick succession.
Horn of Gabriel Sigil - This symbol is able to attract any angel who is around to the caster.
Angel Trap - It's another way to trap Angels besides Holy Fire.
Angel Imprisoning Sigil - It could temporarily imprison them. When imprisoned, they can lost his powers temporarily. The sigil also block any sound from inside of the warded room to be heard by any angels in outside of the room.
Alcohol - A whole liquor store's supply of alcohol is sufficient enough to cause a normal angel, cut off from heaven's power, to become intoxicated.