news, reviews, discussion forums, etc.
dpreview - IMHO, the best digital photography site. By far the best equipment reviews
Rob Galbraith site - excellent site. The forums are particularly useful because you don't have to weed out "equipment speculation" postings
Photo.net - Philip Greenspun photo site. Outstanding
Digital outback photo - an excellent online magazine
Chasseur d'Images digital photography forum (in French). Lots of pre-release equipment-related rumors
wetpixel.com - dedicated to underwater digital photography
digideep.com - underwater digital photography again; a comprehensive list of underwater housings
Canon cameras
Canon digital photography site (Powershot). Downloadable manuals, firmware
lenses
Photodo - excellent lens testing site (with MTF charts). Unfortunately, not updated since June 2000
Photozone review site
Another site mirroring the lens review section of Photozone
lighting (strobes, flashes)
Elinchrom Ranger - similar to the Hensel Porty, but pulse length 2 - 4 times shorter
Quantum Instruments (Qflash)
High-speed strobe (pulse duration less than 0.1 ms)
Digital Camera Battery - DC/DC convertor-based high-capacity external batteries
odds & ends
Wimberley's gimbal-type tripod head
workflow
Breeze software tools for digital cameras
Bibble RAW image manipulation software
Colorvision's Spyder & OptiCAL (monitor calibration)
Fred Miranda's very useful collection of Photoshop actions
The Digital Dog - Andrew Rodney's site (color management stuff)
ImageMagic (versatile image manipulation executables and libraries)
Extensis Portfolio (organization and management of raw image files)
ICC Profile Downloads (Popular Photography magazine). I have not tried them myself
The monitor calibration and gamma assessment page by Pete Andrews
equipment vendors
ACE Index: specialty dealers, photography equipment sales by categories
BH photo - the biggest imaging equipment store
techinfo
Foveon - the manufacturer of the "full-color" image sensor
How to use Panorama Tools & PTGui to produce a printable panorama
Canon PowerShot Guide for Linux Users - information on CRW structure and useful utilities - de-compressing, showing the raw file heap structure, decoding. (David Coffin's site)
Introduction to resolution and MTF curves
SoudVision - an intro on how digital cameras work
Canon PowerShot S300 - the mids behind the magic. An interesting article about the challenges involved in creating a new digicam
Measuring resolution and test charts
nature, landscape, wildlife photography
Nature Photographers online magazine
North American Nature Photography Association
Photosig.com - very good site created and maintained by smart folks (Willis Boyce and others)
Mountain Light - fascinating photos by Galen and Barbara Rowell
Luminous landscape - Michael Reichmann
Yann Arthus-Bertrand - Earth from above
Inspirational images - Ken Hornbrook
Gerard Kingma Travel and Nature Photography
Andy Rouse Wildlife Photography