Hero Initiative which provides aid to comic artist, writers, and other creators of titles since the Golden Age. As we all know, artists rarely recieve the kind of true credit they deserve for their creations, so the H.I. tries to assist them financially. They accept donations, and also raise funds by selling exclusive artwork and limited edition comic books.
Another group that greatly helps the rights of comics creators is the Comic Book Legal Defense Fund. They provide legal assistance to artist, publishers, retailers, and even comics collectors too. They accept donations, and you can become an active members.