Matthias Büttner's website features photographs from Germany, Poland, the Czech Republic and China, mainly steam but also endangered species of railcars, diesels and electrics. Well worth a look. The text is in German but it's not difficult to find your way around the site if you don't speak the language.
On Spoorwegnostalgie Dave Habraken features steam in China and elsewhere as well as vintage diesels in his native Belgium. Text is in Dutch but easy enough to find your way round.
Treni e Cartoline Sicilia
Treni e Cartoline Sicilia features railways in Sicily, one of the last haunts of Italy's veteran electric locomotives. Mostly in Italian but the introduction is in English, French and Spanish.
White Mask Snaps
John Hooson's photographs - mainly British diesels in the most scenic locations but some Chinese steam as well.
Bill Watson's site features pictures from the best locations in Scotland and the North of England.
International Working Steam
Rob Dickinson's International Working Steam is an excellent source of up to date information on the world's last working steam locomotives.