https://github.com/isocpp/CppCoreGuidelines
https://github.com/lefticus/cppbestpractices
https://github.com/dbohdan/compilers-targeting-c
https://github.com/Microsoft/GSL
https://github.com/scylladb/seastar
https://github.com/google/brotli
https://github.com/google/zopfli
https://github.com/google/styleguide
https://github.com/WhisperSystems/libaxolotl-c

http://gameprogrammingpatterns.com/

https://github.com/bagder/c-ares

http://www.yeppp.info/