Well let's say you know Kotlin well and program for the Android platform a lot. You can search Github for projects using the Kotlin language which contain the

Well let's say you know Kotlin well and program for the Android platform a lot. You can search Github for projects using the Kotlin language which contain the word Android, with the most stars like this: https://github.com/search?o=desc&q=language%3AKotlin+Android&s=stars&type=Repositories https://github.com/search?o=desc&q=language%3AKotlin+Android... We go down six and see Google's android architecture components. We click on it and click on pull requests. We look at what is open and what is closed. We see a month ago someone sent a pull request which was merged - https://github.com/googlesamples/android-architecture-components/pull/479 https://github.com/googlesamples/android-architecture-compon... If we go back more we can see other merged requests in the recent past. This is a project with a "few recent merged pull requests". People sent a patch to the code in a pull request, and their branch was merged into the main code base. While this example was Android and Kotlin, you can look at other languages you have more familiarity with, and other focuses. Projects with a lot of stars and/or forks are good candidates to look at, and you can sort by them. I did add the caveat recent though, as sometimes a project has been abandoned for a year or more, and there might be no active project owner to merge pull requests.