The main purpose of Polybar is to help users create awesome status
bars.  It has built-in functionality to display information about the
most commonly used services.  Some of the services included so far:

    Systray icons
    Window title
    Playback controls and status display for MPD using libmpdclient
    ALSA volume controls
    Workspace and desktop panel for bspwm and i3
    Workspace module for EWMH compliant window managers
    Keyboard layout and indicator status
    CPU and memory load indicator
    Battery display
    Network connection details
    Backlight level
    Date and time label
    Time-based shell script execution
    Command output tailing
    User-defined menu tree
    Inter-process messaging
    And more...

WWW: https://github.com/jaagr/polybar