6 links
Herodotus on the Web
isidore-of-seville.com
Annotated guide and web directory to Herodotus of Halicarnassus and his times.
Herodotus, The Histories (ed. A. D. Godley)
perseus.tufts.edu
The Histories printed on the Internet, available in Greek or English.
The Persian Wars by Herodotus
mcadams.posc.mu.edu
Hypertext of the English translation by George Rawlinson, divided by book.