slstatus is described as 'Status monitor for window managers that use WM_NAME or stdin to fill the status bar' and is an app. There are more than 10 alternatives to slstatus for a variety of platforms, including Linux, Wayland, FreeBSD, BSD and openSUSE apps. The best slstatus alternative is Quickshell, which is both free and Open Source. Other great apps like slstatus are zebar, ironbar, Yambar and nwg-panel.
SFWBar (S* Floating Window Bar) is a flexible taskbar application for wayland compositors, designed with a stacking layout in mind. Originally developed for Sway, SFWBar will work with any wayland compositor supporting layer shell protocol, the taskbar and window switcher...
lemonbar (formerly known as bar) is a lightweight statusbar based on XCB. Provides full UTF-8 support, basic formatting, RandR and Xinerama support and EWMH compliance without wasting your precious memory.
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.
