* JSON data set of projects funded by the World Bank, US zip (postal) codes, listed stocks, Enron emails, startup company information

http://mtgjson.com

* Magic the Gathering Card data

https://github.com/zeMirco/sf-city-lots-json

* City Lots of San Francisco

http://www.reddit.com/r/datasets/comments/1uyd0t/200000_jeop...

* Jeopardy Questions

http://labrosa.ee.columbia.edu/millionsong/lastfm

* Last.fm Million Song Dataset

http://datahub.io/dataset?res_format=JSON

* 231 JSON datasets