HauntProject.com many projects you can build. Some easy. Some hard. Directions vary from easy to follow to pretty obscure but all of it pretty interesting and inspiring. Site is essentially a link dump to many other project sites.
Never knew you could use a wiper motor to create so many cool things. Including this ghoulish groundbreaker corpse found at the Garage of Evil.
I had a ton of Halloween fun looking at all the projects.