Modern Deco Universal Monsters Poster Series by Tom Whalen

 Tom Whalen Classic Monster Collectors Folio Halloween Print Set for Dark Hall Mansion

I'm digging these the Black & White variant editions even more.

Mad Mod Monster Party Art by Shag

Groovy Universal Monster Series by Shag for Dark Hall Mansion

A Selection of Creepy Cute Halloween DIY Papercraft Figures

Just click the name links for PDFs and printable patterns.

Cat w/Pumpkin, Swamp Monster, Wolfman, Bat, and Hipster Vamp via Chemical9

All 10 of Chemical9's terrific Halloween creatures here

Nosferatu, Mummy, Simple Skelly, and Big Head Skelly via Paper Toy
And even more figures tagged Halloween @Paper Toy here

Mummy, Drac & Wolfman via Disney's Spoonful.com

A lot more of Disney Halloween printables here

Glamourous Creatures - Classic Monsters as Flappers by Jeffrey Thomas

Jeffrey Thomas via The Mary Sue