Humble Bundle used to make it possible to select which charity you wanted to give to, and I used to select the FreeBSD Foundation and give them the whole amount.

But I can't figure out how to do custom selection of charity any longer. Does anyone know?

edit I missed the "custom" part of your comment. I don't remember that ever being a thing, but I never got particularly detailed with moving the levers around before.

It's in a collapsed section titled "Choose where your money goes" which is beneath the price selection tools now.

[1] https://pasteboard.co/IF9gtLR.png

The section in your screenshot is for the charities, but it used to be that instead of the pre-selected charities you could choose another one from a huge list of charities and that one included the FreeBSD Foundation. And that's what I'm wondering about, if anyone knows if that is still possible.

Humble Bundle is under new ownership (IGN), now, so I wouldn't be surprised if they took that away.

That is what prompted me, actually! My coworker alerted me to this sale and I jumped on it. Something about Absolute OpenBSD spoke to me, and I had to pick it up first... maybe it's the "Practical Paranoid" part.