CTG.cz
A map detailing Prague's tram network.
http://www.ctg.cz/transport/pt_prague.html

Doprova.cx
Find out more about the historic tram line that operates in the city.
http://www.doprava.cx/english/praha.php#hist

Doprava.cx
A list of Prague's tram lines.
http://www.doprava.cx/english/prahalin.php

Doprava.cx
Tells you which trams run at night.
http://www.doprava.cx/english/prahanoc.php

DP-Praha
The "Travel Information" section on this page includes information about the city's nostalgic tram service, as well as its funicular railway.
http://www.dp-praha.cz/en/index.htm

NYCSubway.org
Tram spotters will love this page.
http://www.nycsubway.org/eu/cz/prague.html

Odyssey.on.ca
Tram and metro map.
http://www.odyssey.on.ca/~europrail/prague.htm