Classical (Greek, Roman, early Christian)
Restoration and Augustan (A site at San Antonio College, not by me)
18th, 19th and 20th century English literature (Not my periods, really)
Art and Music (A cocktail)
Religion-related sites (Very limited)
Humanities and Computing (But many others offer more)
Supplementary literary texts (mostly medieval & renaissance) on my home page
The Oxford Book of English Verse, edited by Arthur Quiller-Couch in 1919.
World Cultures, at Washington State University.
The Alex Catalogue of Electronic Texts (fully searchable).