Decameron Web
Created by Brown University, this is a wonderful site offering full reference on every aspect of Boccaccio's masterpiece. A research tool allows a search using key words to be run on everything from the work itself to the articles published on this site. Also available are a history of the work; Boccaccio's biography; insights into the work according to main themes, maps, illustrations, and full religious, social and historical background.
Giovanni Boccaccio: Catholic Encyclopedia
The Catholic Encyclopedia's version of Giovanni Boccaccio's life offers a concise look at the Decameron with links to related subjects.
Boccaccio at the Geoffrey Chaucer Page
"Giovanni Boccaccio is, with the older Dante and their contemporary Francis Pertrarch, one of the three great poets of the Italian fourteenth century." This is a short but useful survey of Boccaccio's influence on Dante, providing links to fragments from the Clerk's Tale, Franklin's Tale, Merchant's Tale, Pardoner's Prologue, Reeve's Tale and Shipman's Tale which drew from Boccaccio's Decameron. A short reference bibliography is also available.
Giovanni Boccaccio at Johns Hopkins University
A brief survey of Boccaccio's historical importance as a literary theorist and critic written by Prof. David Wallace for the Johns Hopkins Guide to Literary Theory and Criticism.