std.logger

String logging facilities for Phobos.

Docu:
http://burner.github.io/phobos/phobos-prerelease/std_logger_core.html
http://burner.github.io/phobos/phobos-prerelease/std_logger_filelogger.html
http://burner.github.io/phobos/phobos-prerelease/std_logger_multilogger.html
http://burner.github.io/phobos/phobos-prerelease/std_logger_nulllogger.html

dub
http://code.dlang.org/packages/logger
>  In my opinion, this makes things more complicated than necessary. If somebody wants the File wrapped by their logger to be destructed deterministically, just tell them to explicitly destroy the logger instance instead of leaving it for the GC to collect.

Agreed.