I know the one on the right is a tuck marker. I'm not sure if the one on the left is also, because it is a little smaller. They do look very similar. If anyone knows for sure let me know.
I believe these are hemmer feet. I am missing some and the part to connect them to my machine. I have found lots of other sets like this one on ebay, some even with manuals. I think I may finally invest in one to have all the parts.