My First Attempt at a card was a birthday card for my mother in law

I put vellum on the inside of the gate.

Flip Card

Slider Card

Carmeloso Designs

Accordian Card

I designed this card after reading several descriptions of how to do it by hand. Since I can't cut that many straight lines in a row and stay sane, I designed it in DesignSpace.

Some Gate Fold Cards

I wanted to see if there was a limit to how many pieces you could join together.  The envelope is the only limit.  It gets pretty thick at this point.