This site contains a brief history of the keyboard instruments of the Baroque era, as well as a fairly exhaustive list of Baroque keyboard composers, and their compositions.

Information from this site is derived from the following sources:

The encyclopedias and dictionaries of Oxford Music Online

The International Music Score Library Project, a resource of older editions of printed music; all scores available are public domain

The Pedagogy Central Online Music Store, where scores can be purchased directly from this website.  All orders are handled by Amazon.com.