Photography

Bruce Percy
Charlie Waite
Murray Fredericks
Mark Raymond Mason: Fine Art Abstract Photography
PhotoAccess - Public access arts centre based in Canberra
Glen Turvey
Rob Gray nature photography
 

Digital image processing

darktable - This is my current preferred raw processing tool
The GIMP, an open source image editor
hugin, an open source panorama photo stitcher
Adjusting your monitor
Color management and color science: Introduction by Norman Koren the best explanation I've ever read of why you can't reproduce all the colours you can see with 3 primary colours
Charles Poynton - Color technology - Gamma and colour explained