What kind of plant is this?
Epipremnum aureum. :)
That is a pothos.
Careful they get big fast.
Yours is what they call "Golden Pothos" (just to add to previous posts). They're pretty easy to care for, as pumpkin says.
If that pot does not have a drain hole, this plant probably won't stay looking good for long, because it will become unhealthy. Sure is pretty though, both plant and pot!
And don't let it sit out in the full sun!