1. Possibly Elleanthus aureus
2. Ditto
3. Looks like a Maxillaria, but I don't know which.
4. Have to see the plant and plant size on this - my first thought was Stelis, but I suspect the plant is too big and can't really see the flowers clearly, but they don't look like Stelis.
5. Almost certainly an Epidendrum or an Encyclia, perhaps Epi. macrostachyum
Ron thank you. The whole plant in photo #4 was about a third to a half a meter tall.
I definitely can't be Stelis, then, the largest of those is only a few inches. Would like to see the flowers closer - it's really hard to tell in the picture you've posted what they're like.