online newspapers

I really don't know, but here is a site where you can check some newspapers out:

http://allyoucanread.com/newspapers.asp

ITALIAN

I like this one :

A world apart

corriere dalla sera

Italian newspapers list

SPANISH
For a begining

Busca de diarios

GERMAN

for a begining, but I'm sure Walter will tell us more

Die Welt

RUSSIAN

For a begining, that's "true"

Pravda

A few links to Italian daily newspapers and weekly magazines:

Corriere della Sera (based in Milan - centrist)
La Repubblica (based in Rome - liberal)
La Stampa (based in Turin - centrist)
L'Unità (liberal/left)
Il Sole 24 Ore (business)
Il Gazzettino (based in Venice)
Il Riformista (liberal/left)
Il Manifesto (left-wing)

L'Espresso (weekly, same publisher as La Repubblica)
Panorama (weekly, owned by prime minister Berlusconi's media group)