Looks like our photo frames section is woefully lacking. Frames aren't one of the things I tend to focus on, and although I have a number of different frames, most of these individual pages contain more than one frame offering. Since I produce all my own contents, take all the photos, isolate each one individually then prepare them as .psd or .png files so while it doesn't look like much based on the links below, there are a good few on those pages.
If I had to choose my favourites, the first one would be the Hand-Coloured Floral Frame (one of the most recent), the Vintage Film Slide frames, and one of the first set uploaded, the Kitten and Nature frames.
Hand-Coloured Floral Frame and Frame Templates
Vintage PNG Photo Frames - Round 2
4 Vintage Photo Frames in PNG Format
2011Vintage Calendar Frame and Vintage Photo Frames with Film Slides
Black Photoshop Frames - Simple Elegance
Free Photo Frames
Photo Frames for Photoshop (Templates)
More Photo Frames
Photo Edges & Frames in Photoshop
Photoshop - Free Photo Frames, Edges and Templates
A lot of the frames have come from vintage photos - one of the oldest was a cardboard frame surrounding a baby photo of my mother, born in 1930. It's an unusual shape, and the actual frame itself is still quite sturdy and in pretty good shape.
Just at the moment (Nov. 2013) the site they're linked from is down - sorry for the missing links, but I'm currently working on rebuilding site. I've had a ton of server issues so I'm moving it over, but since I had to move it, I figured I might as well update things along the way. Hopefully, it will be fully recovered and back online before the end of 2013.
If you really need one of the frames that is on a page where the link doesn't work - please, leave a message and I'll send you a direct download link for it.