Here is a story that happened about 24 hours ago, I downloaded an open-source application called JSONExport on Softpedia, but it is so ugly, it request the address book permissions when it runs. I posted a tweet about this.
And then I found the developer's(Ali) GitHub account of JSONExport, and also found its repository.
I downloaded the source code and made a build, but there is a bug under Dark Mode on macOS, so I fixed and submitted a PR, but unfortunately the developer seems so busy and has no time to fix the bugs that has been confirmed by mail.
So JSONExport comes out.
Not released yet.
Everyone can download it on Mac App Store for free.
One more thing
The source repository that JSONExport Model bases on is developed by Ahmed Ali.
JSONExport Model's source code: https://github.com/hzb/JSONExport.