Charity which benefits after death

If your parents have passed away, you can still give charity on their behalf. In'sha'Allah they will benefit from your righteous actions. 

Ibn Abbas narrated, A man said to Allah's Apostle (S.A.W) , "My mother died, will it benefit her if I give in charity on her behalf?" The Prophet (S.A.W) replied in the affirmative. The man said, "I have a garden and I make you a witness that I give it in charity on her behalf." [see Bukhari for actual hadith]

(a reminder to myself first and foremost, in'sha'Allah)
May Allah ALMIGHTY reward us immensely, Ameen!