The Ancient Library: The Complete Classics Bookshelf on the Web

"Scanned secondary works, including classical dictionaries, histories, grammars and other classics books. A large collection of primary texts, both scanned and in HTML text. All primary sources will allow Wiki-style commentary. A "Wiki Classical Dictionary" users can edit, similar in some respects to Wikipedia. Community mechanisms, including forums for classicists and others interested in the ancient world to interact. "