Social Philosophy: We Have to Give?

Here is some stuff on giving to charity.

Free Charity! The Hunger Site. Just clicking there donates food! Also, try the word game at FreeRice.
Affordable Charities! $10 Club, Microcredit, & Oxfam.
Research on Effective Charities! Want to know which charities aren't squandering their donations? Check out Charity Navigator or GiveWell.
Peter Singer's been promoting his new book a lot lately. He's pointed out the biases that keep us from giving, and called out professors for not teaching about poverty.
NPR's Fresh Air ran a radio interview with someone who argues that a lot of current aid does more harm than good. (Donate to his organization here.)
Here's a great article on the concerns about giving aid to African nations. I recommend reading the last section.
Why would we give away the money we earn? (This article even references Thomas Nagel's anti-I'M-SPECIAL-ism.)