[Frinzer]

n the Theravada tradition, one makes gifts & offerings (charity) on behalf of the deceased and dedicates that merit to them.

I was just about to post that. In Sri Lanka, we have these alms givings, which can either be charitable offerings to say an orphanage or to monks in terms of food, clothing and other items.

Also, there's another thing where a monk would come in and give a sermon in the dhamma, as a way of helping people cope with loss. This is done, for a reason unknown to me, 7 days after the death of a person, then in 7 months and then on the death anniversary annually.