OmniWing Paper Airplane: Contains its history, conception, and construction.
Paper Kraft: Blog for paper crafting beginners which shows paper models, origami, paper automata, pop-up cards, and instructional videos.
Papertoys.com: Includes free paper foldup toys to print, color, fold, and glue.
Print-n-Play Toys: Great assortment of paper toys that you can print and play with. Asks for small fee.
Skilch Crafts: Features paper automata with an attitude, cardboard models kits to cut out and make.