"Lieutenant Kijé" was written as film music, but I don't know
if the movie was actually made.
Sting stole a part of the melody from the Romance in "Kijé"
for "Russians". At least he had the courtesy to mention
that in the album notes.
Other interesting and quite well known music by Prokofiev
is "Peter and the wolf" (a children's story) and "Love for
three oranges" (an opera). He has also done some very
original piano pieces, which is only natural since he
was sort of a piano virtuoso.
And let's not forget his symphonies, especially the first
(the "classical") springs to mind.