G3log is an asynchronous, "crash safe", logger that is easy to use with default logging sinks or you can add your own. G3log is made with plain C++14 (C++11 support up to release 1.3.2) with no external libraries (except gtest used for unit tests). G3log is made to be cross-platform, currently running on OSX, Windows and several Linux distros. See Readme below for details of usage.
KjellKod/g3log has 961 GitHub stars.
It currently ranks #10281 daily, #11397 weekly, #15027 monthly by momentum on Trending Repos; its best-ever rank is #3590.