Python

In 2006, a groundbreaking TED talk used statistics to reveal surprising insights about the developing world, including how many people in South Africa have HIV despite free and available anti-retroviral drugs. Gustav Praekelt, founder of Praekelt.org, heard this TED talk and began tenaciously calling a local hospital to convince them to start an SMS program that would promote anti-retrovirals. The program that resulted from those calls became txtAlert—a successful and widely recognized mobile health program that dramatically improves medical appointment adherence and creates a free channel for patients to communicate with the hospital...

In 2008, I started studying physics and got in contact with Linux, since a bunch of people used it for data analysis and simulations. Comprehension came fast and easy with such people around, and I was strongly encouraged to get things done with Linux. I installed Ubuntu on my notebook, and soon got familiar with Bash and the standard tools. After some years I turned to theoretical physics. While I was writing my master's thesis I gained access to a workstation running Scientific Linux, and a cluster system with a few hundred cores. I was impressed that each of my peers had implemented his own customized workflow, and that it was actually possible to work entirely with the keyboard, which is inconceivable for a Windows user...

In Eastern and Southern Africa, women are still dying unnecessarily during the basic, natural act of giving life. According to Unicef, “In 2010, close to 58,000 women lost their lives during pregnancy and childbirth, accounting for more than one fifth of all such deaths in the world.” Gustav Praekelt, founder of the South African design and development firm Praekelt.com, was deeply affected by the high maternal mortality rate in his country and realized in 2007 that open source software and mobile phones could help provide critical information and services to combat poverty and maternal mortality rates -- among other social issues -- across the continent and potentially around the world.