As for charity world contribution, I would like to share on Mother Teresa's Mission.
Missionaries of Charity is a Roman Catholic religious order established in 1950 by Mother Teresa of Calcutta, whose mission was to care for (in Mother Teresa's words) "the hungry, the naked, the homeless, the crippled, the blind, the lepers, all those people who feel unwanted, unloved, uncared for throughout society, people that have become a burden to the society and are shunned by everyone." Member nuns must adhere to the vows of chastity, poverty and obedience, and the fourth vow, to give "Wholehearted and Free service to the poorest of the poor".
It began as a small community with 12 members in Calcutta, and today it has over 4,500 nuns running orphanages, AIDS hospices, charity centres worldwide, and caring for refugees, the blind, disabled, aged, alcoholics, the poor and homeless and victims of floods, epidemics and famine in Asia, Africa, Latin America, North America, Europe and Australia.
Mother Teresa had devoted her life into charity career...Another great icon that we respect.
http://en.wikipedia.org/wiki/Mother_Teresa