This one is a streptocarpus, it's a very lovely plant.
I had one of those for my birthday and I liked the pot and the plant so much I bought another one. I don't know it's name in English but we call it slaapkamer geluk.Quickly translated it says bedroom luck.
These are peperomia's, a lovely plant for places with some shadow.
This cactus we call Easter cactus, because he blooms around Easter.