[n] person who makes a gift of property
[n] an advocate who presents a person (as for an award or a degree or an introduction etc.)
[n] someone who presents a message of some sort (as a petition or an address or a check or a memorial etc.)
abnegator, advocate, advocator, almsgiver, altruist, benefactor, communicator, contributor, exponent, helper, Indian giver, philanthropist, proponent, subscriber, subsidiser, subsidizer, tipper
\Pre*sent"er\, n. One who presents.