Cirkul - A water bottle that customizes the flavor of your water
SurveyCTO - Collect data you can trust Offline or online, in the field, on the street, or in the lab.
Tinder - Tinder is how people meet. It's like real life, but better.
DHIS2 - Manage aggregate data with a flexible data model which has been field-tested for more than 15 years.
Trafi - The most connected transport app!
Open Data Kit - The Open Data Kit community produces free and open-source software for collecting, managing, and using data in resource-constrained environments.