I like to donate to Ostomy 2-1-1. It's a nonprofit run by Deb Fox. Donations can be mailed to her at the address below. She can provide you a receipt for your tax deductible donation (I think it's $50/pound).
Ostomy 2-1-1
c/o Olivet Baptist Church
1201 NW 10th St
Oklahoma City, OK 73106