Pirate Radio Of The Offshore Kind - Features lots of offshore broadcasters -- pics and history-intensive.
Anorak's Archive - Large pictures and lots of facts about many of the offshore players and stations during their heyday.
Radio Musications: Offshore Radio - A collection of articles covering several aspects of the European offshore era, from infrastructure to notable names.
Hoods Up - It's Alan's Radio Pages - Major archive of history on the UK scene - complete with lots of audio and pics.
Bob Le-Roi - Amazing collection of offshore photos and audio clips, with extensive commentary.
Index of Offshore Radio Homepages - Includes movies with Radio London & Caroline, also some excellent info on Radio Syd and Radio Nord.
Pirate Alley UK - Features extensive information on the "third wave" of offshore pirates, including Radios Caroline and London.
Specific Station Sites
Offshore 98 - This 50-hour station broadcast during the Easter holiday of 1999.
Army Sea Forts
Arutz 7 - The snazzy home of Israel's most famous offshore broadcaster.
The Official Radio Caroline Website - The full story about the most popular offshore station in history.
Caroline in the 70s - Norman Barrington, one of the original Radio Caroline presenters, maintains this comprehensive archive of the popular station's glory days.