Primary sources:

• Victorian Web: The Victorian and Earlier Sermon (links to full texts, plus some critical discussion)
• Internet Modern History Sourcebook: 19th Century Britain (e-texts, multiple denominations)
• Project Canterbury (all things Anglican, including sermons by such figures as John Keble, E. B. Pusey, etc.)
• Israel Abrahams and Claude Goldsmith Montefiore, Aspects of Judaism (sixteen Anglo-Jewish sermons)
• Hermann Adler, A Course of Sermons on the Biblical Passages Adduced by Christian Theologians in Support of the Dogmas of Their Faith (by a Victorian Chief Rabbi)
• Horatius Bonar (sermons, hymns)
• Thomas Chalmers (sermons and other e-texts, plus additional material)
• Andrew Gray (sermons, writings on the Great Disruption, etc.)
• Charles Kingsley, All Saints' Day, and Other Sermons (complete vol.)
• Robert Murray M'Cheyne (sermons, critical discussion, links)
• George MacDonald's Unspoken Sermons (all 3 vols.)
• The Newman Reader (sermons and many other e-texts)
• Frederick W. Robertson (sermons)
• Reformed Reader: Charles H. Spurgeon (sermons delivered at Exeter Hall)
• Spurgeon Collection (a Spurgeon sermon "blog"; appears to be defunct)
• The Spurgeon Archive (all things C. H. Spurgeon)
• Victorian Times: Charles Voysey (a sermon on religion and schooling)

Secondary sources:

• Hugh Douglas, Robert Lawson of Maybole (includes discussion of Lawson's ministry, plus some excerpts from Lawson's writings other than sermons)
• Robert Ellison, "A Born Preacher" (on George MacDonald)
• Adam Mendelsohn, "Tongue Ties" (English & 19th-c. Jewish culture, including the spread of English-language sermons)
• William S. Peterson, "Sermons and Preaching" (general bibliography, including Victorian-related works)
• Nigel Scotland, "Evangelicals, Anglicans and Ritualism in Victorian England" (article on CofE conflicts, with discussion of various sermons)
• Christopher Snook, "Thy Word is All, If We Could Spell" (M.A. thesis on Pusey and Tractarian aesthetics)
• Victorian London: J. Ewing Ritchie, About London (report on a Spiritualist sermon delivered by an American)
• Appleby Parish Magazine (Victorian news reports on various sermons, parish activities, etc.)
• Victorian Religion: A Scrapbook of Newspaper Articles by George Burgess (transcripts of newspaper reports in Burgess' collection)

(I've only linked to a couple of texts in Google Books, but there's quite a bit available there now.)

[X-posted from The Little Professor.]