Lots of the pictures are of different Ansellia africanas. Which is totally fine since it is one of my favorites!
It's always very interesting to see all the different color variations and patterns in Ansellias.
For the other orchids...
My guesses are:
Picture 8 might be some kind of Eulophia.
Picture 11 looks like some kind of Aerangis.
Picture 18 & 19 must be a dendrobium of some sort.
Pictures 27 & 28 look like some kind of Aerangis again to me.
I so wish that I could have orchids growing wild in the garden like that, but the humidity here in Namibia is just not high enough for most of the year. I just love epiphytes that are actually growing on threes as they are supposed to.
Thanks for the sharing.
Picture 7 looks like some kind of Aerangis to me.