These are the ones I've seen:
Against All Flags (1952)
Blackbeard the Pirate (1952)
Blackbeard's Ghost (1968)
Captain Blood (1924)
Captain Kidd (1922)
Captain Pirate (1952)
...aka Captain Blood, Fugitive (1952)
Cutthroat Island (1995)
Goonies, The (1985)
Hook (1991)
Morgan the Pirate (1961)
...aka Capitaine Morgan (1961)
Muppet Treasure Island (1996)
Peter Pan (1924)
Peter Pan (1953)
Peter Pan (2003)
Pirate's Island (1991) (TV)
Pirates of Tortuga (1961)
Prince of Pirates (1953)
Princess and the Pirate, The (1944)
Return to Treasure Island, The (1992)
Treasure Island (1950)
Treasure Planet
Pirates of the Caribbean: Curse of the Black Pearl
Pirates of the Caribbean: Dead Man's Chest
Although my fiancé's grandfather (who lives next door) has pretty much all the old pirate movies on the list, so by the end of the year I'll probably have seen 90% of them :)
I was very happy to see Pirate's Island on the list, I saw that when I was 12 on Belgian TV and I absolutely loved it but it's not very well known :)