A few weeks ago, I found a great product on Amazon...tested it and have been using it for applique foundation. It is a wee bit "outside the box" but works great for me. I've been glue (washable children's glue stick) basting applique shapes and hand stitching them together to create all kinds of applique shapes.
Even small items are working great (can you just spy the little bird's tail in the upper left corner of this photo?). What has been really wonderful is that I've been able to use this foundation and not have to sew baste anything! No freezer paper either! Plus, no REMOVING it after the applique shapes are sewn into place...because it starts out stiff enough to fold the fabric seam allowance over nicely; THEN, softens up when it is washed! How great is that!
Just so you know...I'm NOT getting any type of kick-back for this...just wanted to share a good idea! This is designed for use in machine embroidery hoops. It comes in sheets (see above Amazon.com writeup)...and in a large roll (see below Amazon.com writeup).
So, I'm thinking..."Why not cut the foundation sheets in this shape...glue-baste the fabrics on top (with seam allowance included)...then fold the seam allowance to the back and glue-baste them down) just as though they were applique shapes? All that is needed then is to sew them together in the fashion of English Paper Piecing (but no paper to remove later!!).
I'm cutting out my shapes...and giving this a go! Will post later next week with the results. ;)