Delta System
   New rules and skills, a campaign based on the manga Appleseed and another set in a world savaged by extreme natural forces and torn by a great war, for the Delta Force system.
   http://www.vampyreweb.com/rpg/delta/

Mercenaries, Spies and Private Eyes
   A contemporary system in which the players are flinty mercenaries, suave spies, and gumshoe detectives.
   http://www.flyingbuffalo.com/mercen.htm

Modus Operandi
   Articles, NPCs, downloads, forums, news, and scenario hooks for various espionage systems.
   http://www.modus-operandi.co.uk/

National Security Decision-Making Game
   The NSDM Game recreates real-world international crises of the present or immediate future. Ideas for scenarios are taken from current headlines and developing trends. Players take the parts of national leaders, dignitaries, ambassadors, military leaders,
   http://www.nsdmg.org/

The Adventures of Luther Arkwright
   Review and ordering information of a system in which players take the parts of people living on alternative Earths.
   http://www.modernvikings.com/luther-arkwright/rpg.htm

Web-Grognards: Commando
   Variant combat and character-generation rules for SPI's roleplaying game set in World War II.
   http://grognard.com/variants/commando.pdf