Bits of Paper: 3D Carnation and Hydrangea Paper Flowers
DIY Pop-up card : DIY and Craft Tutorials
15 Fantastic Pieces of Origami
DIY Cardboard Latern Template
DIY 3D Christmas Ornament
Love those cardboard deer heads? Here's the template to make your own!
Home-Dzine - Make a cardboard chandelier (DIY tutorial with free printable) - has other examples with decorations & other paint colors too)
Cardboard Ferris Wheel by ~CrimsonPearls on deviantART