Often we tend to think of technology as being too expensive/difficult to employ except on a large scale. But one project in Ethiopia found that loading e-readers for extension workers made a big difference as they had access to a lot of material but none of the hassle of carrying around a load of stuff.
In Sudan, a simple SMS can alert farmers to rainfall forecasts enabling better preparedness for floods or, letting them know how much water would be optimal for their crops at a given time. Small steps with big results.