It’s not known exactly how many people live in Makoko, a slum in the Nigerian city of Lagos. The Code for Africa initiative hopes to use open-source technology to map Makoko with the aim of improving its infrastructure.

Billion-dollar acquisitions by tech giants Microsoft and IBM have shaken the open-source community. Will these investments spell the death of the idealistic movement? Or are they a sign that open source has won?

U.S. online dating coach Amie Leadingham has tested the Facebook Dating platform and doubts that it can compete with the established sites. She says the number of potential partners on offer is limited.