I want find charity organizations to donate my on line poker profit

[AKQJT]

won over one millions by playing online poker last 7 years. Will continue to win a few millions in rest of my life. Bought a few houses. Working with the family trust lawyer. If I die, one of the house will goes to my lovely boy, all others will be donated to charity organization .
How to find a list of charity organizations so I can pick one of them? Need recommendation also which charity organization I should denote to. Thanks.