Mass Murder and the Postal Purges - An American Tragedy
- Essay critical of the United States Postal Service and the part of its culture that inspires violence in those who feel wronged.
- http://www.fdungan.com/usps1.htm

SpankMe's Mass Murder
- Contains profiles by country and kill count. Deals only with those who used guns.
- http://massmurder.zyns.com/

Nation's Worst Mass Killing
- Chronological time-line of mass murders in Australia and New Zealand up to 1996.
- http://www.geniac.net/portarthur/nationsw.htm