Publicly-accesible:

News from Nowhere, On-line illustrated edition.
Arts and Crafts Museum (Cheltenham Art Gallery & Museum)
The Pre-Raphaelite Critic
The Rossetti Archive
Victoria Research Web
Victorian Web
Victorian Web Sites (Link compendium)
Victorian Women Writers Project
Voice of the Shuttle - Victorian (Link compendium)

Online texts that require log-in for full access:

Dictionary of Literary Biography (essays by Boos on Janet Hamilton, Augusta Webster, Dante Gabriel Rossetti, Annie Matheson and Violet Jacob)
Nineteenth-Century Fiction
Nineteenth Century Literature
Nineteenth Century Music
Victorian Poetry
Victorian Literature and Culture
Victorian Studies: A Journal of the Humanities Arts and Sciences