Witchipedia is a good wiki-style site that has helpful basic information on many witchcraft-related topics. It's a good jumping off point for most witchy research.
Witches' Almanac
The Witches' Almanac provides a good daily bit of info that is always interesting. It's a perfect way to begin a day prepared with what's going on in your world.
Llewellyn Worldwide
Llewellyn is one of the oldest publishers of occult books out there. Their site has a large number of free articles, and a huge catalog of authors.
Eclectic Witchcraft
A blog maintained by a practicing witch with over two decades of experience. Lots of great information for beginners on various topics that even experienced witches will enjoy.
Witchery and Me
A really well put together blog and online Book of Shadows. The "Path" section has some great introductory sections. Definitely a great resource for any level of experience.
The Witchcraft Way
The Witchcraft Way is a wonderful site with all sorts of helpful resources for those looking for information on different paths and many other topics. One of my favorite sites out there!