Das Ping is a Das Keyboard Applet that periodically pings a website and assigns a color to a key based on the response time. The colors and timings are configurable. It works well for monitoring downtime as well as performance for websites.
Requires a Das Keyboard Q Series: www.daskeyboard.com.
Installation, configuration and uninstallation of applets is done within the Q Desktop application (https://www.daskeyboard.com/q)
Pull requests welcome.