  Open source software has an increasing importance in our modern society,
providing basic services to other software systems and also supporting the
rapid development of a variety of end-user applications. Recently, world-wide
code sharing platforms, like GitHub, are also contributing to open source's
growth. However, little is known on how this growth is distributed around the
world and about the characteristics of the projects developed in different
countries. In this article, we provide a characterization of 2,648 open source
projects developed in 20 countries. We reveal the number of projects per
country, the popularity and programming language of each country's project and
also show how the number of projects in a country correlates to its GDP.
Finally, we assess the maintainability and internal code quality of the studied
projects, using a tool called BetterCodeHub.
