ScriptCover: Javascript coverage analysis tool

If you would just like to build it and test it on OS X and share the build with other:

  git clone https://code.google.com/p/script-cover/
  cd script-cover
  ./build.py
  gem install crxmake
  crxmake --pack-extension="build" --extension-output="ScriptCover".crx

Pretty useless without an install link for the normals.