The 1st one looks like a form or hybrid of humilis (or albiflora?), but the gradient of color of the lip (especially the yellow part) puzzles me, really gorgeous though.
the 2nd picture looks hybrid in nature (x barbarae ?)
I've seen plants looking similar to 3-4-5 being sold as achromatic/albinos forms of limprichtii, but since they seem to be growing epiphytic on those pictures, I doubt....
