i3status-rs is a feature-rich and resource-friendly replacement for i3status, written in pure Rust. It provides a way to display "blocks" of system information (time, battery status, volume, etc) on bars that support the i3bar protocol.
Xmobar is a minimalistic status bar. It was originally designed and implemented to work with xmonad, but it is actually usable with any window manager in X11 and also (via its text output mode) Wayland.
