With Donate a Photo you can make your photos do good. Johnson & Johnson donates $1 per photo uploaded to the cause that you pick, and you can do it once per day.
This is my first hunt, and a special one, as @donateaphoto inspired me to start @CreddonHQ :-) According to their terms of use, they will not use the photos in any product advertising, so it should be all good. Unfortunately, it is only available in the United States and the UK at the moment, but I hope those of you who are eligible will try it!
Creddon