Have you tried the Easel Card? and the Double version?  

There is also a Video Tutorial on how to make the basic card here

There are also instructions to make the ...
 Twisted Easel Card
Triple Easel Card
Triple Twisted Easel
Quad Easel
Gatefold Easel

You have lots of variations on the Easel Card theme.

But if you want to try the double version then here are the steps you need to take. 

Step 1

You will need a piece of card that measures 20.5cms square
(8" square)

Step 2

Then you will need to score and fold the card in half. (The black dashed line)

One of the halves then needs to be measured in half, but don't crease it.

(The pink dashed line shows where you need to CUT the card) 

Step 3

Take each of the panels and fold the inner edge down to the outer edge.

(The photo shows you how it should look )

Step 4

Cut to pieces of card 10.25cms square (4" square)

Apply glue to the lower triangle of the card only.

(The photo shows you where)

Step 5

Carefully attach the two pieces of card to the triangular flaps.

Make sure that they don't interfere with the opening of the card.

I find it easier to lay the card down as shown here to attach the pieces of card.

And if you use wet glue you will have a little time to re-adjust before the glue sets 

Line the bottom inside of the card with some pretty paper of your choice.

You will need to make a centre panel and place it on some deep foam pads or silicone glue to raise it up.

This is the piece that will hold the easel open.