Okay, I'm back for a bit. First off, good on you for helping out. Donating even a LITTLE money is a HUGE help.
Sponsoring a child is a great way to get involved and "feel" involved. Earlier I wrote about CARE and world Vision (WV). Both of which are amazing organizations that do amazing Humanitarian work with the poorest of the poor. (Ever hear of a "care package"? yep, that's from CARE). WV is a "strong" christian organization if you're into that. Care isn't overtly christian if you'd prefer to go that route.
When my wife and I first sponsored a child years and years ago, we used WV. It was a great way to "feel involved" and it gave us a name, place, location, and all that to research. Catholic Relief services is also a great organization. http://crs.org/ So is the International committee of the Red Cross http://www.icrc.org/eng/index.jsp
If you are interested in Development (rather than Humanitarian aid), I would look at AED http://www.aed.org/
If you are VERY worried about getting ripped off, check out Global Giving http://www.globalgiving.org/ or Kiva http://www.kiva.org/.
Global giving allows you to directly give to very small (or large) organizations doing EXACTLY what you're interested in. It is essentially a platform that verifies the veracity of organizations and provides a way to search for organizations. Great stuff. Let's say (for example) you're interested in children's development via sports in Kenya... just type it into the search and you'll get results.
Kiva allows you to give microloans directly to individuals. If you are a HUGE libertarian, this is the organization for you. Directly provide capital to businessmen/women. It's a loan, not a donation, so the money should be returned, allowing you to loan again. (Global giving probably is a good place for the libertarians as well).
ummm... I guess I'll end my rant for now. If someone has a specific question, I can try to answer it.