As someone who loves things that can be put to multiple uses I am happy that many of these products are not restricted to bag making . You could use the zippers to make zipper flowers. I love them as embellishments.
In fact, you do not even need to know to sew to use some of these. For instance, you could revamp a dull looking bag or a leather/denim jacket or belts by attaching some rivets or spikes studs to them.
You could even make you own headband like the one Sonakshi Sinha wore at the Zee Cine Awards. Just attach spike studs to an existing hairband and there you have it- your very own spiked headband - no sewing required.