The cute gorilla is by Lionel Albertino, you can find it in “Safari Origami”, ISBN 2844240062. You can download the book because the author re-published it for free, thanks to him! It’s in French, but folding conventions are international :)The book has plenty of other models.
It’s folded from one sheet of square 20cm paper. I really like the mouth :)
The leaves are by Jeremy Shafer. They’re folded from one square sheet of 20cm paper. Here’s the video tutorial.