Mansion Cryptbats: Great for Haunted Mansion type designs.
Check out his other free fonts for awesome inspiration.
Deco Tech is a great font to use for retro style designs.
Font Diner has some really cool fonts that I like to use. My favorite is their sparkly font.
Kingthings has some awesome fonts. I like to use Kingthings Christmas for holiday designs.
That's all for now. I'll add more fonts to the list when I get more time. :)