Yell works and is tested with ruby 1.8.7, 1.9.x, 2.0.0, jruby 1.8 and 1.9 mode, rubinius 1.8 and 1.9 as well as ree.
If you want to conveniently use Yell with Rails, then head over to yell-rails. You'll find all the documentation in this repository, though.
Yell alternatives and similar gems
Based on the "Logging" category
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