Proceedings of the 13th International Numismatic Congress, Madrid 2003
Full Numismatic Books Online (most downloadable)
Educational sites (in no particular order)
Architecture on Coins Excellent German site.
CoinArchives.com is a repository of coins previously featured in major numismatic auctions. (Rather limited unless you pay for the Pro version)
http://www.muenzgeschichte.ch/inc/ information about the International Numismatic Commission
http://www.snible.org/coins/hn/ Historia Numorum, the famous manual of Greek Numismatics by Barclay V. Head
Svoronos online (the comprehensive Ptolemaic coinage reference)
Doug Smith- Ancient Greek and Roman Coins 2003 Version An Educational Site on Roman Coins, Greek Coins and other Ancient Coins
Wildwinds The WildWinds website has been created as a reference, attribution and valuation resource in the field of ancient numismatics.
http://www.diadumenian.com/ Coins of Diadumenian
http://www.inumis.com/books/index.html iNumis offers a large number of reference works on coins, for free online consultation.
http://nomisma.org/id/igch a preliminary work creating an XML version of An Inventory of Greek Coin Hoards (IGCH).
http://donum.numismatics.org ANS Library Catalog Search
Calgary Coins reference guides
Virtual numismatic exhibition of gold coins in the Catholic University, Milan (in Italian)
Educational Websites about Ancient Coins more links
http://www.startlocal.com.au/articles/educational_numismatics.html A Guide to Coin Collecting- with more links
Commercial sites with added value
VCoins - The Online Coin Show with links to many dealers' holdings. Excellent for finding photogenic specimens
CGB.fr French site with English version. A nice section on fakes.
Forum Ancient Coins. Articles and useful resources in addition to a commercial section
http://www.sixbid.com/ All current electronic auctions online
A selection of museums with important holdings of ancient coins and numismatic institutions
http://www.imj.org.il/eng/archaeology/numismatics/index.html The Israel museum collections: special topics
http://www.eretzmuseum.org.il/58/23.htm The Kadman numismatic pavilion
Around the world:
Santander Bank Collection (Spain) (Fancy Flash site)
Public Collections of Ancient Coins more links
Not strictly coins
http://www.roman-emperors.org/ An Online Encyclopedia of Roman Rulers and their Families