These are just a few that I use.
The Blogress This blog isn't so much for writing tips, but she makes me laugh. Sometimes that's what I need to get through a rough patch.
The Bookshelf Muse
Dedicated to helping writers via descriptive tools, knowledge sharing, and support. Amen to that. I enjoy the blog very much and I think the Emotion Thesaurus is a must have. It helps me to show not tell.
Seventh Sanctum a site of random tools for creativity and more!They have a collection of 'generators' that make random characters, plots, ideas to use in your writing. Plus it can just be fun.
Writing Excuses it is a short podcast chock full of writing advice.
Query Shark shows you how to revise and strengthen query letters.
Behind the Name is a random name generator.
The Muse Online Writers Conference it is a week long conference. There are so many classes available and the opportunity to pitch your book. It is free, but donations are accepted.
NaNoWriMo it is not just for November. There is always something happening on the forums.
Savvy Authors there is a $30.00 fee to join. Non-Members are welcome too. Classes cost just a bit more if you are not a member. If you plan on taking a few courses it more than makes up the cost.
750 Words encourages you to write 750 words a day. Every day.
Fake Word Generator - Something every fantasy writer should have in their bag of tricks.
TV Tropes is a catalog of the tricks of the trade for writing fiction. Warning: It can be a real time waster but it is a fun site.
Heroine Maker This is an awesome time waster. I don't want to spoil your fun. Go forth and create.
Write or Die this is a fun little program that forces you to write rapidly. You can determine the severity of the consequences. If you stop typing it can start eating your words. Freak!! Or the worst thing that ever happened to me. Bananna Phone. That song has stuck in my head for years. I warn you DO NOT click that link.