So I recently began working with Natron the Opensource Compositor, so far its been a relatively simple cross over from Nuke. It does a few things differently and has a few nodes missing, one of which is the Edge Blur. I use the edge blur a lot, so obviously I had to recreate it for use in Natron. So here is how you would go about doing that.
I could just post the the XML code here on the post for you, but where would the fun in that be? Enjoy
Download Natron Here – natron.fr