The Public Domain Review (a project of the Open Knowledge Foundation) has alerted us to the online publication of a sixteenth-century rhyming dictionary, Peter Levins's 1570 Manipulus Vocabulorum. A Dictionary of English and Latin Words, Arranged in the Alphabetical Order of the Last Syllable. See the Public Doman Review's introduction (and read the text) here: http://publicdomainreview.org/collections/manipulus-vocabulorum-a-rhyming-dictionary-from-the-16th-century/
You can access this pioneering rhyming dictionary--a facsimile of the 1867 Camden Society edition--online (with a neat page-turning format) or you can download it as a pdf file, either at the Public Domain Review link listed above, or at the Internet Archive (where the text is hosted) here.
The scans were provided by the California Digital Library from a book in the University of California Libraries.