A good, broad introduction to the culture. Metis An interface for viewing ancient Greek archaeological sites on Quick Time 3.0. There is a large range of sites, which are listed alphabetically and geographically. The hyperlinks are excellent, providing background information and sources for further reading. Smyth's Greek Grammar A dictionary of Greek grammar which is sophisticated and thorough.
Users can click on each word for a pop-up definition and literary exempla.
A dictionary of latin grammar will be coming soon on this site which is still under construction but promises to be complete soon. All the information and links you might require on the ancient world. A search engine makes navigation simple. Links are also grouped by category. There are even some lesson plans on the site.