Traditions

In Wicca, there are many traditions. I don't know everything about all of them, I don't even know all of them. I can tell you a general description of the few I do know.

• Alexandrian Wicca: Alex Sanders founded this tradition in the 1960's. Originally based in England, practitioners work sky-clad and much of their ritual is similar to Gardnerian practices, though Alexandrians place more emphasis on ceremonial magicks. Sanders calls himself 'King' of his witches.
• Black Forest Clan: The clan practices a tradition known as Euro-Witchcraft, which includes the Caledonii Tradition of Druidic Wicca, Gardnerian, German, and Celtic witchcraft. Training in this tradition prepares one as a licensed member of the clergy. The High Priests and High Priestesses do not hive off. Instead, they multiply by forming new covens while remaining part of their original coven. This makes the clan both stron in unity and numbers. 
• British Traditional: There are a number of different British Traditions, all of which are based on what people believe to be the pre-Christian practices of England. Many British Traditional groups follow Janet and Stewart Farrar, who have written a number of influential books about witchcraft. The groups tend to be structured, with training for neophytes (beginners) following a degree program under the supervision of the coven. Their practices are said to be a mix of Celtic and Gardnerian traditions. 
• Celtic Wicca: This tradition looks to ancient Celtic and Druidic deities and beliefs with an emphasis on the magickal and healing powers of plants, minerals, gnomes, fairies, and Elemental spirits.
• Dianic Tradition:The Dianic Tradition focuses on the Goddess with little talk about a God. The Goddess is worshiped in her 3 forms: Maiden, Mother and Crone. There are different varieties of Dianic withes. Since the 1970's, the Dianic Tradition has been seen as the feminist movement of the Craft. Some, but not all, Dianic covens are strictly women.
• Feri: There are a number of ways to spell the name of this tradition; such as: Fairy, Faery and Faerie. Victor Anderson is credited with bringing the Feri tradition to the U.S, where he has taught in the San Fransisco area since the late 1960's. Feri teachers tend to add something of their own when teaching, so there is a strain of eclecticism in this tradition. Feri's are usually solitary.
• Gardnerian Wicca: In the 1950's, after England repealed it's witchcraft laws, Gerald Gardner went public about his practice of witchcraft. He rewrote the rituals of the coven he belonged to so they would be more accurate. Gardnerian covens have a degree system in which one learns about the Craft. Individuals must be initiated by the coven and cannot initiate themselves through self-study. Gardnerian covens work sky-clad. In addition, some try to have equal numbers of men and women in the coven.
•  Georgian Wicca: George Patterson founded the Georgian tradition in Bakersfeild, California in 1970. His followers are also known as the Georgian Church. Their rituals are drawn from Gardnerian and Alexandrian traditions, with other elements added as the coven members see fit. In fact, in some covens members write their own rituals. Some Georgian covens work sky-clad and some do not. 
• Reclaiming: Starhawk, author of The Spiral Dance, received her training in the Feri tradition from Victor Anderson. In 1980, she and some of the women in her coven went on to co-found the Reclaiming Collective. Reclaiming focuses on linking magick and spirituality with political activism. The teachings of the tradition, which is non-hierarchical, have spread from the San Fransisco Bay area and are disseminated by individual teachers and at which camps, week long programs that are offered in the U.S, Canada, England and Germany.
• Seax-Wica: In 1962, Raymond Buckland, a protege of Gerald Gardner moved to the U.S, where he founded this tradition. Buckland taught the Gardnerian tradition for a number of years. Because of problems that he saw in the practice of the Craft, he started his own tradition in 1973. Seax-Wica is based on Saxon traditions, but as Buckland admits, he made it up alone. Covens decide for themselves if they will work sky-clad or not. Witches in this tradition can be initiated by the coven or through self-study.
• Strega Witches: This type of witch follows traditions from Italy sometimes known as 'La Vecchia Religione' or The old Religion. Some people trace Strega teachings back to a woman, Aradia, in the 14th century. The Strega tradition is rapidly gaining popularity in the U.S. 

Like I said before: This isn't all of them, just the few I know about.