Giotto Art Display: Features thumbnailed works and includes a short biography and related links.
Image Gallery / Giotto: Virtual gallery of some of the works of the artist.
Olga's Gallery: Giotto: Collection of the images of his works with biography and historical comments.
The Worldwide Art Gallery: Giotto di Bondone: Biography and an image of St Francis Receiving the Stigmata which is generally considered to be his greatest work.
Web Gallery of Art: Giotto: Introduction to his life and works.