Catholic Encyclopedia
The name "Raphael" means, "God has healed", which is apropos in light of St. Raphael's role in the book of Tobit (and some would add, in the Gospel of John).
Catholic Online
Paragraph about the archangel Raphael, patron saint of travelers. Suitable for children.
My Patron Saints
By Tom Kreitzberg. A quick runthrough of Raphael's role in the book of Tobit, and, on a separate page, a litany to St. Raphael.
Patron Saints Index
Illustrated profile of St. Raphael, who at first called himself Azariah. With links. And the dates for birth and death are amusing--what do you say for an archangel?
Vietnamese Eucharistic Youth Society
About the archangels Raphael, Gabriel, and Michael. Suitable for children.