For ten years, I worked on codebases written in C++ without using any third party libraries (no, not even STL -- we needed faster, thread safe versions of strings and maps which were not available at the time; Boost? What's that?), its own custom messaging middleware built directly on sockets, its on distributed process management system built with unix syscalls (obviously). There was not a single line of HTML, Java…
Ouch. Should have stayed in legacy C++.