interviewBy Anand Jagatia
WeFarm is designed to be the "internet for people who have no internet". Using basic mobile phones, it provides small-scale farmers with access to crowdsourced answers to farming questions.
Royal Botanic Gardens, Kew, developed an acoustic sensor to detect disease-carrying mosquitoes. The aim is to better understand and control outbreaks of disease by tracking different mosquito populations.
These two, which were among the four winners of the 2014 Google Impact Challenge in the UK, developed projects specifically targeted at the developing world. The award supports UK charities that use technology to make a better world. The winners receive £500,000 (around US$843,000) each to take their ideas into the field.