These online apps are free to use without ads and without membership. They were made and published by Ron Spain.
Maybe you're finally learning Morse code, or maybe you just need to brush up. This app test your ability to decode those Morse code dots and dashes into single letters, numbers, and basic punctuation symbols. You simply listen to the beeps and press the appropriate key on your keyboard or click on the letter on the screen to answer. If you weren't paying attention, you can replay the Morse code by pressing your spacebar.
This web app allows you to set named waypoints so your phone or other GPS-capable device can help you navigate to complete your mission. You enter your waypoints, then the app regularly speaks the direction and distance to the next waypoint, showing an arrow indicating the compass direction. Hold your phone so North is at the top of the screen to see the actual direction. The app uses red colors in an attempt to avoid harming your night vision.
This web app creates random cellular automata that are three-dimensional, but with the third dimension smaller and portayed by colors, often producing a psychedelic display. To see another, click in the frame below.