Is there any exemplary open sourced project which uses the majority/most of C11 standard's new features?

I am learning on static code analysis, but have been struggling to find such real world projects that would be decent test cases for C11 features. In the meantime, any open sourced projects which heavily used C++11 and later features would be appreciated as well.

I tried searching over GitHub and google search results, and only found mini C compiler projects which only used a few of new C11 traits.