I think it's very important question: are there libraries without ACTIVE maintainers?
For what? Because without active maintainers we can't guarantee quality of the libraries.
Is Boost community sure, that for all Boost libraries there are active maintainers? E.g. see on Boost.Property_tree - on Github repo you can find a lot of "dead" pull requests without any answer.
There was an internal list of "undermaintained" libraries kicking around a few years ago where somebody had looked through the open bug count and pull requests, and decided how stale those libraries looked e.g. pull requests not merged nor closed in over a year, major open bugs not closed after five years etc. It was sixty-something libraries if I remember right. Likely more today. Niall -- ned Productions Limited Consulting http://www.nedproductions.biz/ http://ie.linkedin.com/in/nialldouglas/