I'm looking for fonts that display white with a black outline for use over photos. I need good contrast when the background is busy. Any suggestions?

Fonts can't have a visible outline - it's a feature of fontmaking. So there're no fonts with two colours. What you see ist the filling.

When you think of "outline-fonts" with a hollow area - the "outline" is not a real outline too, it's the filling of the letter. The rest is transparent and cannot be filled with colour.

For to get the desired effekt you have to use a programm like CorelDraw or Freehand or Illustrator. There you can add an outline in any colour to any font.
There's no other way to get the effect.

Ute