Is there any repository to Jason Browser (http://docs.jasonette.com/jason/) app for Android to download source code and debug through?
I don't believe so but if you want ot debug you would be best to get the git repo for the Android jasonette, change the string resource to point to your json per the documentation and go from there.
The Jason app itself is a Jasonette app so it's just a JSON file. It's not public right now but there's nothing special about it. I will open source the JSON for the JASON app sometime in the near future.
Looking forward for it. Thank you!