The small round multicolored ship is from Star Wars. I don't know the name of it. But I've seen it before.
If by this you mean the ship in front of the Valley Forge then no, it's not from Star Wars, though it does look a little like the escape pod from the first film.
It is one of the most devious ones btw.
Lots more correct guesses. Particular gratz on Dan for recognising the HMS Camden Lock, which I thought would be one of the hardest ones going. Also to pack of wolves for spotting both the UFO and the SHADO missile interceptor. I'll put together another red outline thing later.
Also whoever got Dark Star and Kugai for noting, quite correctly, that that is the Nostromo whilst attached to its oil refinery module. Did you read Alan Dean Fosters novelisation or is that in the fact sheet that pops up at the start?