Other
Ballroom dancers.com: Learn the Dance
This site contains information on the history and styles of ballroom dances. Find the type of dance you're interested in and the site will provide an overview, syllabus, featured steps, and even music.
Other
Johann Strauss, Jr. 1825 1899
A biography of Johann Strauss, Jr. (1825-1899 CE) with lots of images plus an extensive list of compositions.