Education

Singapore Learning
http://www.singaporelearning.com
An exciting site with games, competitons, animated E-learning content and original showcase of student's projects.

General Photography

Norman Koren Photography
http://www.normankoren.com
A comprehensive site with excellent images and tutorials.

Photo.net
http://www.photo.net
A great complete photography site that includes equipment reviews, discussions and forum.

DP Review
http://www.dpreview.com
Excellent information on cameras and camera reviews.  Great forum site for the major camera makers.

Image Processing and Research

Computer Vision HomePage
http://www-2.cs.cmu.edu/afs/cs/project/cil/ftp/html/vision.html
The Computer Vision Homepage was established at Carnegie Mellon University in 1994 to provide a central location for World Wide Web links relating to computer vision research. A good resource site for users interested in Computer Vision Research.

Intel Open Source Computer Vision
http://www.intel.com/research/mrl/research/opencv
Computer vision routines, applications and tutorials. Open Source, free for academic and commercial use.

Davide Pizzolato Website
http://www.xdp.it
Free C++ image processing and conversion library with source codes.