Offering a good sense of the brutal working conditions that confronted workers during the Progressive Era, the "Life in the Mines" site compiles a range of sources on what it was like to be a coal miner in the early 1900s.
HBO produced Iron-Jawed Angels, a dramatization of the final years in the struggle for women's suffrage; the companion website offers a detailed timeline, images, and primary sources.
The Encyclopedia of Chicago provides a number of valuable references to Progressivism in the context of the Windy City, including this interactive map from Hull House of its surrounding inhabitants and their ethnicities.
You can take a virtual tour of a New York City tenement, courtesy of the Lower East Side Tenement Museum.
The Avalon Project at Yale Law School offers a copy of the U.S. Constitution with dates of congressional approval and ratification for each amendment, including the the Eighteenth Amendment (liquor prohibition) and the Nineteenth Amendment (women's suffrage).
Brown University hosts a digital archive on the temperance movement.