There are no works that do either of those two things.
Works cannot bring about forgiveness or else it is not grace but wages due. And without the shedding of blood there is no forgiveness of sins so works don't cut it.
Works don't make faith fruitful. Faith is fruitful or not. If it is, works result.
Here are a couple of questions which, I believe, will lead you toward a better understanding of the saving faith found in the Scriptures:
What caused the walls of Jericho to fall?
A. Faith
B. Marching
C. God’s power
D. All of the above
E. None of the above
Which element(s) was/were not necessary?
A. Faith
B. Marching
C. God’s power
D. All of the above
E. None of the above