systray topic
tint3
A C++ rewrite of the tint2 panel
buzz
A simple system tray application for notifying about unseen e-mail
bspwmbar
A lightweight status bar for bspwm.
dwm
Matteo Salonia's build of dwm + dwmblocks + slock + included scripts
taffybar
A gtk based status bar for tiling window managers such as XMonad
CommandTrayHost
A command line program monitor systray for Windows
linux-gui-legacy
(Discontinued in favor of official client) GTK3 GUI client with systray, for ProtonVPN. Works on top of linux-cli.
connectr
A super lightweight Spotify controller
scuttle-shell
A system tray app for running Secure Scuttlebutt and providing sbot features to your local system