The A Companion to Digital Literary Studies edited by Ray Siemens and Susan Schreibman is available online in full text. This is tremendous resource with too many excellent contributions to list individually. Chapters go from Reading on the Screen by Christian Vandendorpe and Algorithmic Criticism by Stephen Ramsay.
There is a good Annotated Overview of Selected Electronic Resources by Tanya Clement and Gretchen Gueguen with links to projects like TAPoR.