Europe

Autobahnen - Exit lists for all the German Autobahnen.

Autosnelwegen.net - Exits and route numbering in Belgium, Netherlands and Luxembourg (the Benelux region). In Dutch and English.

5 Minutes Away - Directory of services and facilities within five minutes of each UK motorway junction, including those within service areas. Entries include junction diagrams.

Motorway Database - Database of the junctions on every numbered motorway in Britain. Includes junction diagrams.