This site contains links to various documents listing those murdered in 1940 in Katyń, Miednoje, Charków and Bykowina go to the site here.
List of soldiers of the Polish armed forces deceased overseas between 1939-1946
Published by the Polish Historical Institute named after General Sikorski, London 1952. Copy of this list is available in the Sikorski Institute. Once downloaded (large file), it can be searched. Get the list here. Site under re-construction at present.
Cemeteries in Persia/Iran
A very comprehensive article about cemeteries in Iran is published here
List of Polish cemeteries in Iran on the Polish Embassy site
Cemeteries in Africa The Polish Pedagogical University in Krakow has been restoring and researching the graves of the civilians who died whilst in refugee camps in Africa. This site provides lists of the graves in the various locations in Africa.
Polish military cemeteries in the UK
This site has a very useful list of cemeteries in the UK