I dunno about any sites (part from Craftster
) but if you know how to insert a zipper, you're pretty much all set.
Coin purses like those are just two pieces of fabric sewn together, and turned right side out, unless the stitching was decorative or something.
If you're doing a complicated shape, or if you're using felt, I'd go for cutting the fabric with harddlyyy any seam allowance and just stitch around the edges with a pretty coloured embroidery thread.
If you're using fabric, I'd do the sew with right sides in, and turn out. That doesn't really work for complicated shapes though cus when you poke out all the edges and stuff it still doesn't really look like the shape you wanted :/
And of course, before all that, you sew the zipper to the edge you want it.
And add on applique if ya wanna cutesify it ^__^
That was all assuming you don't want it to be beaded like the one you posted. If you do.. I have no clue lol.
Also, if you were doing a shape like that turtle which would have loads of annoying bits for the coins to get into and you only want the coins to be in the shell part, I'd make a lining that was only as big as the shell part.