[vonklaus]

This is as impossible to answer as:

What charity should I give money to?

I would love to have a talented teacher, so I would say mentorship, ect.

The EFF although they have more technical resources than most.

Depends on 100% what you are passionate about. Without that info the target is any non-profit

[tyingq]

Not quite the same question to me. Finding lists of charities that take donations is easy and obvious. Finding lists that would take volunteer coding is less easy. OP seems to be looking for a list, not specific advice on which organization to select.