One can, of course, simple cannibalize old pants for the fabric and sew any project you can imagine that involves some small pieces. I could not hope to make something so cute as this Adorable Whale, so I'll send you to it's creator!
Use the sturdiness of the material to your advantage! A long lasting rug can be made from even small scraps.For the more ambitious, be inspired by the Scrap Lab. This chair is made from industrial scraps and suggest a plethora of furniture options. Perhaps with old chair frames that have lost their fabric bits?
A sleek and simple choice - potholders from the pockets of old pants. (Be sure your machine can handle sewing thru that many denim layers!) Also, how crafty are the Finns!
If you want to turn those pockets into more spaces for holding things (as pockets are wont to do), consider an organizer. You might think it looks like overkill, and you don't have all that much stuff... you do. Unless your house looks like an IKEA catalog, you can totally find enough random things laying around to warrant wall pockets.

