Though the site is (obviously) focused on Jack the Ripper, I'm including it here because of the wealth of primary materials it offers, including many articles from magazines and newspapers not only about the Ripper case, but about conditions in Victorian London at the time.
A digital library of 18th and 19th Century journals, including Annual Register, Blackwood's Edinburgh Magazine, Gentleman's Magazine (Vols. 1-20, 1731-1750), Notes and Queries, Philosophical Transactions of the Royal Society, and The Builder.
A free, online edition of six 19th-century periodicals and newspapers: The Monthly Repository of Theology and General Literature; The Northern Star and Leeds General Advertiser; The Leader; The English Woman's Journal; The Tomahawk - A Saturday Journal of Satire; and The Publisher's Circular.
"The National Library of Scotland's online collection of nearly 1,800 broadsides lets you see for yourself what 'the word on the street' was in Scotland between 1650 and 1910. Crime, politics, romance, emigration, humour, tragedy, royalty and superstitions - all these and more are here."
"Here you'll find bits and pieces that I've collected or found interesting about 19th-century American children. You'll also find works selected from early children's books and magazines."
Dedicated to the study of the world's first mechanized "mass" press--newspapers, magazines, and other serial publications--that came into being in 19th-century Britain and its Empire.