My own Media Player done with JavaFX.
Has buttons for "Choose File", "Play", "Pause", "Stop", "Slower", "Faster", "Skip Forward 10 seconds", "Skip backward 10 seconds" and two sliders for volume and progressbar.
Will activate as Fullscreen on Double Click.
Languages and tools used: Java, JavaFX, Maven.
To create an executable JAR use for example the Apache Maven Shade Plugin and add the dependency to the POM file.