Please donate them to the overseas military coupon program. There is a great website called grocerycouponsforfree that gives complete details about the program. The website also has many free grocery coupons if you need more. Please consider donating them to the military.
The easiest way to donate coupons is to just leave them on the shelf when you're shopping. That way people who are going to buy the products anyqay can save a little money.
Many libraries offer "coupon swaps. " Depending on the coupons, you might also want to donate them to a specific charity (women's shelter, animal rescue, senior citizens home, etc).
there are many charities operating all over the world. it will help the poor people. just go to Google home page and type donation for charity. there are lot of organization available. you just log on and enter your details to donate the coupons.