The hinges are simple 2x2 barrel hinges, nothing special, two for each window, externally mounted.
As for the openers, I looked long and hard for appropriate devices and decided to go farther back in history to leverage priciples of Archimedes and gravity studies by Newton......I prop the windows open with a stick!! (sorry, had to)
I had actually tried to source some cool old levers originally used in casement windows, the kind that fold sideways to lock the window closed, and slide through a hoop to push the window open and lock in any position with a thumb screw. After looking at lots of options, I realized that i wanted the space for my screens, as we get bugs mostly at sunset and we use the cottage (mostly) for cocktail hour and sometime dining al fresco.
The windows lock in the closed position with a simple small hook and eye, with the hook mounted on the jamb and the eye on the window, backwards from the way most do it, but I really don't like when the hook on awning windows scars the sill when they drag when closing. the way I have it, that doesn't happen.
Hope that description is what you were interested in