https://www.developer-tech.com/news/2020/mar/27/singapore-covid-19-contract-tracing-app-free-global-developers/

Singapore has made its COVID-19 contract tracing app open source to help developers around the world to build local solutions.

The country is among the worst-hit by the coronavirus due to its proximity to China. Developers in the country undertook a huge effort to build a comprehensive app for contact tracing called TraceTogether and now want to help others.