i3status: i3status (status line generator for i3bar and xmobar)
i3status:
i3status: i3status is a small program (less than 1500 SLOC) for i3bar, xmobar
i3status: or similar programs.  It is designed to be very efficient by issuing
i3status: a very small number of system calls, as one generally wants to
i3status: to update such a status line every second. This ensures that even
i3status: under high load, your status bar is updated correctly. Also, it saves
i3status: a bit of energy by not hogging your CPU as much as spawning the
i3status: corresponding amount of shell commands would.
i3status:
i3status: Website: https://i3wm.org/i3status/