There are 2 repositories under appindicator topic.
An unofficial WhatsApp desktop application for Linux.
Cross-platform SystemTray support for Swing/AWT, macOS, GtkStatusIcon, and AppIndicator on Java 8+
Sound input/output selector indicator for Linux
An Internet radio player for Linux
(Discontinued in favor of official client) GTK3 GUI client with systray, for ProtonVPN. Works on top of linux-cli.
Ubuntu indicator that displays how much load your CPU is under via the dying face from the video game DOOM.
Python bindings for pyNVML and psutil library over network
Vagrant Application Indicator for Ubuntu
Helps with dual booting. Ubuntu tray application to reboot into different OSes or UEFI/BIOS
A StatusNotifierHost widget written using the gtk+3 bindings for haskell provided by gi-gtk.
Simple tray profile switcher for asusctl
:traffic_light: Go bindings for libappindicator3 C library
Simple Ubuntu keyboard modifiers indicator
ExpressVPN GUI for Linux
Indicator applet to control media using Playerctl
Gnome appindicator (toolbar icon) tool to switch between different DNS servers
A Haskell implementation of the StatusNotifierItem protocol (https://www.freedesktop.org/wiki/Specifications/StatusNotifierItem/).
Linux indicator that collects and displays news from a variety of news sources
Library to create and control tray icons with Elisp
Cryptocurrency price indicator for Ubuntu!
Create a system tray menu from a YAML file with shell commands
System tray applet for Gnome desktops that allows you to create push notification from Mqtt topics or publish data to Mqtt topics.
This Python 3 application adds an indicator for your ECOFLOW battery to your notification area.
Battery applet/indicator for the GNOME
Discharge Rate application indicator for Ubuntu desktops
An appindicator for Unity that "says" the time each 15 minutes
App indicator for Linux that shows Red Star Belgrade fixtures
A simplified package to print any text in ubuntu unity panel
This indicator shows the most immediate event of your Google Calendar in your Ubuntu top bar.