Classical: 1750-1825 - Introduction to the period from Essentials of Music linked to details on historical themes, musical context, style, and composer biographies.
Classical Era (1750 - 1820) - Information on the period linked to biographical material for selected composers from The Conservatory at Humanities Web.
Classical Music Era - Wikipedia article outlining the style of the period, providing history of times within the period, and listing noted composers. Includes internal references to related people and topics plus external links.
Kunst der Fuge: fugues of the 18th Century - Inclusive list of fugues written in the 1700's, comprising all the relevant repertory up to date and links to classical musician pages.