Based on the large part of the http://stephaniehurlburt.com/blog/2015/11/5/multithreading-in-a-large-open-world-space-game with minor tweaks, fixes and additions/removals (kudos to @StephanieRct ). Is free of any dependancy. I plan on adding one additional mode and removing usage of std::list.
System spawns threads with aajob::Init(numberOfThreads=0). You can add jobs with aajob::RunJob(). If you wish to use current thread as worker thread also, call aajob::Flush(). Cleanup is done within aajob::Cleanup().
System uses one, global, mt-safe job queue. All jobs are pushed to the queue, and worker threads grab jobs from it. There isn't anything fancy about it, it's the simplest possible job manager that can exist. No sync, it's win-only, no lockless data structures. But in its simplicity, there is power. :P