On this page I have listed various links that might be of assistance.
The Stanford Encyclopedia of Philosophy
Oxford Scholarship Online, you must have a password to access full content
Keith DeRose has an epistemology page with a lot of info. It has links to many epistemologists with online papers, as well as past epistemology seminars from various philosophers.
Jim Pryor at NYU has some advice on how to read and write a philosophy paper; always good to keep in mind.
David Chalmers website is chock-full of good stuff.
Blogs I enjoy and recommend are The Space of Reasons, Philosophy Sucks!, Certain Doubts, and Brian Leiter's.
Duncan Pritchard has a blog on epistemic value.
EpistemeLinks which has links to many further resources; you can even buy philosophy t-shirts, not sure about that one though.
Not really a tool, but an excellent resource for several different areas, the ARCHE Research Centre at St. Andrews.