What can I do with some pillowcases that are no longer needed?

Use them to line a cheap laundry basket from the dollar tree strore. Hot glue some jute rope around the outside of the basket and you have a lovely new creation you place anywhere in your home or give as gift.

You could make throw pillows, make a quilted throw for your legs, clothes for kids, blanket for a baby or doll, placemats or napkins, blouse for yourself or underslip, just a few ideas.

I've made clothespin bags using pillowcases and clothes hangers, used them to line my homemade tote bags, made sachets for my drawers, or as hanging "pockets" in my closet.

You can use them to wash delicates. Toss in a couple of bras and twist the ends of the pillow case in a knot or fold it over and pin it shut.

Cut into strips and make a braid rug.

You can use them 1) to clean your overhead ceiling fans, 2) to store sheet and pillowcase sets in your linen closets so that everything is together, 3) to store dried food in, 4) to cover small pet beds - easier to wash than the entire bed, 4) to wrap breakables on moving day, 5) to donate to Goodwill, etc. for people looking for craft materials, 6) to donate to women's or homeless shelters for people starting over, 7) to use as an emergency baby-changing pad when in a public restroom, 8) to store off-season clothing like sweaters, 9) to hang over clothing to protect them from getting dirty when traveling.

I'm sure there's more but these are things that I've done with them!