I'm not in this one since I don't currently have any products that haven't been included in previous charity bundles, but it's a worthy cause and they're offering $320 worth of games PDFs for a $20 purchase. Last time they raised $178,900.00 - The total for this one is already nearly $11,000! it'd be nice if this time they raised even more, so buy it before the offer ends.
https://www.drivethrustuff.com
later - apologies; this is for the Red Cross, not Doctors Without Borders