A Ruby file parser/interpreter/preprocessor that comments lines of code based on conditions at the time the file is required. Very handy to implement debugging logs and code that has to be commented (not just dynamically switched off).
This project has moved to http://rubyforge.net/projects/log4r Log4r is a flexible logging library for Ruby. With a heiarchial logging system of arbitrary levels and names, multiple output destinations, logger inheritance, custom formatting, etc.