The Royal Canadian Numismatic Association
The RCNA is a non-profit educational organization formed in 1950 and incorporated by Canada Charter in 1963. It has grown by leaps and bounds from an idea of a few dedicated numismatists to become one of the world's largest numismatic associations.
American Numismatic Society
"The ANS collections database contains information on more than 600,000 objects in the Society’s collections. These include coins, paper money, tokens, ‘primitive’ money, medals and decorations, from all parts of the world, and all periods in which such objects have been produced."
Coins and Canada
A superb resource for Canadian coins and tokens. There are discussion boards, numismatic histories, grading guides and news items.
Saskatoon Coin Club - Canadian Coinage
Lots of interesting articles about Canada coins.
Calgary Coins - Chinese coin
Calgary coins have a great China coin identification guide.
Valuable resource for numismatic research and exploration. Ancient, Greek, Roman (including Byzantine), English hammered and Celtic (Iron Age) coins.
Forum Ancient Coins
Forum Ancient Coins is such a useful resource for Ancient coins and links and help.