Musl is fairly new, and it's linux-specific, for those reasons I think many have not heard of it. But it is very good. We use big parts of it in emscripten for

Musl is fairly new, and it's linux-specific, for those reasons I think many have not heard of it. But it is very good. We use big parts of it in emscripten for example, and it works great - nice new and compact code, permissive MIT license, friendly upstream.