A clever alias for OSX that lets you cd to the the frontmost finder window. I found this while perusing Cameron Hayne's awesome bash aliases. http://hayne.net/MacDev/Bash/aliases.bash

cdf.md

# cdf: cd to frontmost window of Finder
cdf () 
{
    currFolderPath=$( /usr/bin/osascript <<"    EOT"
        tell application "Finder"
            try
                set currFolder to (folder of the front window as alias)
            on error
                set currFolder to (path to desktop folder as alias)
            end try
            POSIX path of currFolder
        end tell
    EOT
    )
    echo "cd to \"$currFolderPath\""
    cd "$currFolderPath"
}