Share knowledge as much as you can, it's lifesaving for folks like me who are from poor countries. It's not as direct as giving money to buy food/shelter, but in the long run it pays. I'm learning computer science, for example. Just from internet and course that people put up on there to be accessible from anywhere, that is still something that blows my mind. What poor people lack is access to "good" education. It's not restricted to tech only, it can be about anything that's worth studying. More knowledge = more open mind = more free to think.