Other
Personal Site: Saints & Martyrs
A short summary/history of the role the Christian Saints played during the Middle Ages and how that role changed over time.
Catholic Online
Catholic Online: Saints & Angels
A short account on the number of saints currently in use by the Catholic Church and also provides some information on the concept of the "patron saint."
Other
Holy Spirit Interactive Kids: A Saint a Day
Features short stories of the Saints listed by month and date.
Other
The Vatican Official Homepage: Saints
An index of of saints canonized during the pontificate of John Paul II. Search by date or scroll down a clickable list. Most entries include both a portrait and a full biography, but some bios have yet to be translated into English.