Vanatru, also known as the 'Vanic Way' or the 'Way of the Vanir', is a path within the religion of Heathenism. It has a focus upon the Vanir tribe of deities, which includes Freyja and Freyr, and their parents Njörðr and Njörun.
Freyja is the goddess of magic, sexuality, wealth, and warfare. Freyja's lands of Folkvang are one of the principal afterlifes for followings of Vanatru. She has the first pick of those warriors that die in battle.
Freyr is a god of fertility, agriculture, weather, protection, and wisdom. Freyr is a magician, and is as likely to fight battles with spells from his antler wand than with any other weapon.
Njörun is the earth-mother, and is theorized to be the sister-wife of Njörðr; mother of the Vanir gods and goddesses. She is associated with the land and lakes that are sacred to her. Her image is carried in a procession at the most holy festivals.
Njörðr is the god of the coast, sea travelling, and costal industries. He is also the god of the seas.
Óðr is (was?) the husband of Freyja, and is mentioned only a few times in the lore.
Kvasir was regarded as the wisest of the Vanir. He was exchanged as a peace offering between the Aesir and the Vanir, to end the war between them. He was later killed by two dwarves, who made the mead of wisdom from his blood.
Skaði is a giantess that married Njörðr. This indirectly makes her one of the Vanir, though some people consider her to be part of the Aesir. She is the goddess of the hunt and winter.