1. SystemtrayCross-platform SystemTray support for Swing/AWT, GtkStatusIcon, and AppIndicator on Java 8+
2. NotifyLinux, MacOS, or Windows (notification/growl/toast/) popups for the desktop for Java 6+
3. MessageBusLightweight, extremely fast, and zero-gc message/event bus for Java 6+
4. UDTUDP-based Data Transfer Protocol