Thanks! That's a good list. Some are non-profits looking for volunteers, some are non-profits or for-profits looking for employees.

But I'm wondering if there is some sort of job listing or board that brings together all the salaried jobs (sorry, gotta eat), that help humanity directly in some way.

I don't know how many tech related job listings they have, but you could look at http://www.idealist.org/.

This is their mission statement:

"Idealist connects people, organizations, and resources to help build a world where all people can live free and dignified lives.

Idealist is independent of any government, political ideology, or religious creed. Our work is guided by the common desire of our members and supporters to find practical solutions to social and environmental problems, in a spirit of generosity and mutual respect."

Yes. http://reliefweb.int/jobs

Edit: You'll most definitely want to avoid the big organisations. Also, right now you could join about any NGO and get sent to the Philippine, small NGOs usually work as meritocracy. And networking is key in this field.

Have you questioned yourself, why so many people try to help you to help other people? =) There is hope in humanity, aside from politics, there are human beings who all want each other to help each other. Embettering the world. I wish you best of luck. Hope to hear back from your experience in a a Blog or on HN.

Add to that list:

Telecoms Sans Frontieres http://tsfi.org

I'd never heard of these guys. Telecomix does similar things, but with more activism and politics involved.

Wikimedia https://www.wikimedia.org/