Out of order somehow. 

The weird shaped one with the trumpety white flower is an Angraecum distichum, about half an inch across.

The dark purple orchid with the dangling leaves and babboon-face-shaped flowers is a Lepanthes Gargoyla, leaves one inch across at the widest point. 

The two orchids stuck together with the yellow flower are Haraella odonata, the flower is half an inch tall. 

The plant in the first pic with the striped flower is a Dendrobium lichenastrum, and its leaves are about an inch long, at most.

And last but not least, the cluster with the greenish pronged blooms that you have to look closely for is Bulbophyllum alagense large form, and its leaves are about three fourths of an inch tall, not counting the bulbs.