Saints Alive
Images of relics from around the world. Some lists of saints and beati and their areas of patronage. Promotes the book "International Crusade for Holy Relics."
http://www.ichrusa.com/saintsalive/

What Is a Saint?
An explanation of sainthood and how a person becomes a saint in the Catholic Church.
http://www.catholic-pages.com/saints/explained.asp

Little Pictorial Lives of the Saints
Book edited by John Gilmary Shea, published in 1894. Short illustrated biographies of a saint for each day of the year. You can also browse an alphabetical list.
http://magnificat.ca/cal/engl/

Société des Bollandistes
Provides information on the society, which consists of a team of specialists devoted to hagiographical research (Latin, Greek, and Oriental), and also links to relevant sites.
http://www.kbr.be/~socboll/

Saint of the Day
A popular feature of American Catholic, the online version of St. Anthony Messenger. Every day, a short biographical essay on a saint. Also has option to send e-greetings with images of saints.
http://www.americancatholic.org/Features/SaintofDay/default.asp

Catholic Online: Saints and Angels
Large searchable database of information on Catholic saints.
http://www.catholic.org/saints/

Saints for Sinners
Book by Alban Goodier. Nine biographical profiles, from St. Augustine to St. Benedict Joseph Labre.
http://www.ewtn.com/library/MARY/SNTSIN.HTM

Hagiography Circle
A description of the process of canonization. Database of nineteenth- and twentieth-century saints, beati, and servants of God. Causes introduced since late 1999. Presented by a group with special interest in modern lay and non-Western models of holiness.
http://newsaints.faithweb.com/

Patron Saints Index
Profiles of thousands of saints and beati. Browse by name or by topic. Sanctoral calendar, timeline, FAQs, images.
http://saints.sqpn.com/indexsnt.htm