I've spotted a couple of interesting C++ projects being run under the Apache Software Foundation's banner. Log4cxx and stdcxx.

The stdcxx project is based on Rogue Wave Software's implementation of the C++ Standard Library, which was donated to the Apache Software Foundation earlier this Summer and is currently being incubated in the Apache Incubator. Having used Rogue Wave's non-standard library tools in the past I've got mixed feelings about this, but having another good implementation of the C++ Standard Library as open source should help all C++ developers.

Log4cxx is C++ port of the ubiquitous Log4j project. Love it or hate it, good easy-to-use logging can be a life saver for a developer. If you haven't already got a good, generic, and most importantly sane in-house logging library Log4cxx is worth a good look. It's also worth a look if you've got an existing system, after all like the Boost libraries why waste your time re-inventing the wheel when good, efficient, proven code already exists?