1. Eyes of Halloween
These people do an incredible job of documenting 2010's USA haunted attractions. (Without stealing other people's links and research, too! Yay for them!) Not only do they list the haunt's website address, but also an email contact if possible, and - get this - expected opening date! That's a huge amount of work to develop and maintain.
Besides the haunt listings, they some helpful Halloween articles and how-tos.
2. Fantasy Pumpkins
Year after year, I enjoy coming back to this site to see all the amazing pumpkis. Not only does the site show off nice photos of the pumpkins, but there's often a free pattern you can download in case you dare to attempt one of these complicated designs.
3. Halloween is Here
A fun website with rancid recipes, Halloween party games, a haunted art gallery, Halloween crafts, costume ideas, and graveyard links. The website is clean and easy to navigate, doesn't take itself too seriously, and doesn't pepper the website with ads.
4. Ghost Droppings
An active, interesting forum for Halloween enthusiasts. Whether you're a professional yard haunter, just looking for costume ideas, or you need tips for a Halloween party, you'll probably be glad you came here.
5. The Monster List of Halloween Projects
This incredible resource currently offers 808 links to serious Halloween projects (not crafts for kids). The projects include special effects, props and decorations. There's everything from a $20 fogger to a blinking talking skull and a dangling crank spider. A fabulous website from a very dedicated webmaster. I'm impressed!
More Halloween links coming soon!