A Couple of Useful JSON Viewers

I recently stumbled upon this viewer from a comment on another blog: http://jsonviewer.stack.hu/

A quick google search and I found a few more JSON viewers -

1. A Firefox add-on: https://addons.mozilla.org/en-US/firefox/addon/10869
2. Another online viewer 'service': http://chris.photobooks.com/json/default.htm
3. A standalone viewer and a VS2005 plugin:  http://jsonviewer.codeplex.com/

To bad the plugin from codeplex only looks like it supports VS2005 and hasn't been updated in 3 years :(