Here are some websites I found useful;
http://www.cvpapers.com/ (Many papers available from top-notch CV conferences)
http://szeliski.org/Book/ (A classic)
http://opencv.org (Perhaps most known library)
http://homepages.inf.ed.ac.uk/rbf/CVonline/ (Clear explanations to many topics with example results)
http://iris.usc.edu/information/iris-conferences.html (Conference calendar)
http://www.face-rec.org/ (Face Recognition Website)
Will be updated !