That eagle headed one on the far right (pun intended) is a 1930's German police dagger, for wearing on ceremonial occasions. Some examples have zer swastika on them, but pretty sinister even without.
I'm going to stick my neck out and hazard a guess that this one (in colour) is a German WW2 bayonet, there are a few variations on the web but the grip and the shape look about right.