Are most flags folded into triangles? What are some other interesting rituals performed with other countries flags?

I'm British but I work maintenance in the US. I had to swap out one of our old American Flags for a new one the other day and I did the respectful thing (didn't let it touch the ground and folded it into triangles) and it got me thinking what other countries do for the way their flags should be folded when they're being retired? Or just other ritual they might have instead?