Honorable Mention
This site is a place where public domain paintings, stock photos, and coloring pages are stored, categorized, and made searchable. Anyone can come here and use the category page in the menu or the search bar to find the perfect Catholic image for their project. Did I mention that all the images are free and creative commons? That means that you won't have to worry about copyright issues or stock photo fees.
If you'd like to keep this site free, all you have to do is give a one-time donation or subscribe monthly.