Free
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Community & Government Resources
Giving What We Can
Non-profit with free research on where donations do the most good, plus a public pledge community and evaluations of charities and causes.
From the site: 100x your impact by finding and donating to the best charities. Learn about high-impact philanthropy, join an effective giving community, take a giving pledge.
Why I recommend it: Their cause research is a good model of reasoning under uncertainty, whether or not you pledge. Nothing is paywalled.
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