A bi-directional Slim editor that tones your atts, trims your tags, and gives you results in six seconds or less.
Ruby is required (2.1.3 works great).
git clone https://github.com/wearefine/slim-gym.git
cd slim-gym
bundle install
rackup -p 4567
Open your browser to http://localhost:4567 and start slimming down. Slim Gym is powered by Sinatra.