a person who is altruistic

humanitarian

a person who gives money to charity

donor

a woman who gives money to charity

female donor

a person with whom one exchanges letters

person communicating in writing

a person who often works for charity etc

humanitarian

a person who donates something

giver of gift

a person who gives (help, a present etc)

donor

a professional person who works in journalism

person who writes about factual events for a living

a person who takes part (in an activity)

person who takes part in activity

a person who helps those who are poor or in trouble

humanitarian

a person who writes; an author

person who composes with language