Ghosting effect with open source software
To my knowledge, there is no Open Source tool with a built-in feature for producing that ghosting effect. However, I believe there exist the necessary tools for you to create the effect yourself.

Breaking down what's happening, it looks like the effect consists of:


Freezing and extracting the skater from the background at certain moments
Animating those freeze frames to track with the camera movement


There are Open Source tools to do just that. 


Rotoscoping to extract the skater from still frames (Gimp or Blender)
Motion Tracking (Blender) to animate those stills to match camera motion
Compositing (Blender) to put it all together