This one is pretty useful!

Open current OSX Finder directory in Terminal:

  cdf () {
        target=`osascript -e 'tell application "Finder" to if (count of Finder windows) > 0 then get POSIX path of (target of front Finder window as text)'`
        if [ "$target" != "" ]
        then
                cd "$target"
                pwd
        else
                echo 'No Finder window found' >&2
        fi
}