Pillows, draft stopper for the bottom of a door, use the pockets for a storage sewn onto a larger piece of denim and hang on door, cover and ottoman.... and on and on.
If you want a lot of great denim upcycle ideas you should check out a blogger I know, Claire at Pillar Box Blue. You can check out the denim section of her blog projects here https://www.pillarboxblue.com/denim-3/
Here are a bunch of ideas: https://www.hometalk.com/search/posts?filter=upcycle%20denim
Here's one idea: https://www.hometalk.com/9397173/diy-upcycled-denim-and-copper-magazine-rack
Oh my goodness, I’m so many ways!! Quilts, cushions, upholstery, aprons, bags - I have lots of tutorials on my blog for upcycling denim https://vickymyerscreations.co.uk/category/denim/