I thought I could start a thread on organizations or projects that help people, but are not very well known.
One example is the
Teal Pumpkin project by Food Allergy Research & Education (FARE). This project is for trick-or-treaters who have food allergies or other medical problems and cannot receive common candy fare because of it. So instead, Teal Pumpkin project participants provide non-candy alternatives like party favors to give children with food allergies or medical problems a more inclusive trick or treating experience.