https://www.tokendaily.co/p/developer-report

The Developer Report is a free, open, analysis of open-source contributions in crypto. We analyze over 100M open source code commits to produce these results. Anyone can contribute to our github to help improve the quality of our data.
Shared by 6 on Twitter (Including Leigh Cuen, Stephen McKeon or Wong Joon Ian).
Source: https://www.developerreport.com/developer-report-geography