#3 looks suspiciously ferny to me, but I couldn't tell you which it might be. It's not one of the 50 - 60 that I have, though, so I could tell you what it's not. I would venture, though, that *IF* it is a fern it's an epiphyte...
#4 looks like some of the clover that grows in my yard, but, again, I couldn't tell you what, exactly, it is. Mine are about 3" across.
#6, 7, & 8 look to be a kind of pitcher
plant, which is carnivourous, so feel free to keep it in the kitchen if you have gnats about the fuit bowl, and it should be quite happy with you.