Classical Hellenic Literature

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Hellenic Civilizations
Hellas:
http://www.fordham.edu/halsall/ancient/asbook07.html
Hellenistic World:
http://www.fordham.edu/halsall/ancient/asbook08.html

Ancient Greek writers
http://www.perseus.tufts.edu/cache/perscoll_Greco-Roman.html

in the last link also you can find and Roman writers

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Byzantium Internet Sources
http://www.fordham.edu/halsall/sbook1c.html

Byzantium Lexicography
http://www.stoa.org/sol/