Rail Travel in Europe
Voyages SNCF (Previously Raileurope) For bookings from London to all destinations.
The Man in Seat 61 A goldmine of information about rail and ferry travel in Europe and worldwide. If you intend to travel by train this is a must-read.
Rail Travel in France
SNCF All French national rail timetables (including connections via Eurostar), with the facility for buying tickets.
OUIBUS. SNCF also operate Buses through this site
Loco2 Sometimes the SNCF site can be difficult, This is an alternative site
capitainetrain Another alternative to SCNF.
Rail Travel in Spain
Rail Travel in Portugal
CP Passengers Portuguese national rail service website, English version.