Internet Archive
http://archive.org/details/tomjones_0811_librivox
Contains a short summary of the text and downlodable audio files of the whole novel.
The History of Tom Jones, a Foundling
http://www.bartleby.com/ebook/adobe/301.pdf
Pdf version of the entire text.
The History of Tom Jones, a Foundling
http://www.literaturepage.com/read/tom-jones.html
Online text of the novel.