Start a new terminal in the same directory (i3wm)

xterm.sh

#!/bin/bash
filter="(bash|vi|mc)"
winpid=$(xprop -id $(xdotool getactivewindow) _NET_WM_PID|awk '{print $3}')
if [ -n "$winpid" ]; then 
    lpid=$(pstree -aApT ${winpid}|grep -E  "\\-${filter},[0-9]+" -o|tail -n1|awk -F, '{print $2}')
    if [ -n "${lpid}" ]; then
        cd $(readlink /proc/${lpid}/cwd)
    fi
fi
xterm &

i3wm config:

bindsym $mod+Return exec ~/.config/i3/xterm.sh
bindsym $mod+Shift+Return exec xterm