Happy Birthday Ada - Biography and small portrait. - http://www.adahome.com/articles/1997-12/al_birthday.html
Augusta Ada King Countess of Lovelace - Short biography and four portraits. - http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Lovelace.html
Ada: The Enchantress of Numbers - Comments on her, and her work, from a selection of people and publications in the field. - http://www.well.com/user/adatoole/
Tools For Thought: The First Programmer Was a Lady - By Howard Rheingold. Online copy of well known 1985 book on the invention of modern computing; this chapter on Lady Ada Lovelace, Charles Babbage, Difference and Analytical Engines. Newer (c)2000 edition of the book is out, with follow-up interviews. - http://www.rheingold.com/texts/tft/2.html
Ada Byron, Lady Lovelace - Brief biography, by Dr. Betty Toole, along with a portrait and links. - http://www.agnesscott.edu/lriddle/women/love.htm
The Ada Picture Gallery - Includes a selection of portraits of Ada, Countess of Lovelace. - http://www.cs.kuleuven.ac.be/~dirk/ada-belgium/pictures.html