Software:

For RAW processing:
Adobe Photoshop - Digital camera raw file support
Bibble Labs - Professional Photo-Manipulation Software
Capture One DSLR (C1) LE 3.5.2
Canon Digital Photo Professional
Canon RAW images in MS Explorer
Digital Picture Magic - Windows Shell extension, opens Windows Explorer to RAW files
Logical Designs SharpRaw Image Processing Software
Phase One - RAW Workflow Software designed for the low volume digital photographers
Pixingo PhotoFirst for Mac OS X (Windows XP soon)
Pixmantec RawShooter
SilverFast DCPro for Windows Me or XP or Mac OS X
Windows Shell Hack to Show Thumbnails for THMs - By Mike Fried
Windows Shell Hack to Show Thumbnails for THMs - Local copy of "THMPreview.reg"
YarcPlus Canon RAW Convertor for Windows OS

For sharpening:
1D Mark II CSpro Plugin
10D Finisher - 10D+C1+PS Sharpening action (Free)
Fred Miranda's Photoshop actions for pro digicam users
Intellisharpen II plugin (PC version)
nik Sharpener Pro for Mac and Windows 95/98 NT

For noise reduction:
Neat Image
Noise Ninja
Noiseware
Quantum Mechanic & Photo Mechanic for Mac and Windows 95/98 NT

For Black&White:
Art of RAW Conversion #008 @Digital Outback Photo for Capture One DSLR
B/Works is for creating old fashioned B/W images, Sepia or Duotone colored images

For general post processing:
Adobe Photoshop CS
BreezeBrowser - Browse and Organize Digital Photos, Fast Thumbnail Browser
cam2pc - Image Viewer and fully featured Digital Imaging software to Download, Organize, Modify and Share your photos
Edit JPEG photos without recompression loss - Better JPEG
PhotoCleaner
Picture Window pro - Advanced Photographic Editor
Scott Professional
Shortcut PhotoClean for Windows and Mac OS
Velvia Vision - FM Software

For panoramas:
AUTOPANO
Enblend - Image Blending with Multiresolution Splines
hugin - Panorama Tools GUI
Pix Maker - Create 360 degrees virtual tour animations
PTAssembler - Panorama Tools Assistant

For lens corrections:
DxO Optics Pro 2.0 for Windows or Mac OS X
PTLens - Panorama Tools add-on automatically corrects for distortions

For watermarks:
CopyRightLeft (Free)
Photomark

For effects:
flamingpear - Hot Plug-ins

For EXIF:
Exif Reader for Windows
Exifer for Windows - Restores EXIF metadata
Exifer for Windows - Restores EXIF metadata (Backup link)

For web gallery creation:
JAlbum - free web photo album software
MiniGal

For Archiving:
DigitalPro
FotoStation 4 for Mac and Windows, complete image management
Picasa Photo management software, free from Google. Find, edit, share photos.
Shotkeeper for Windows

For Printing:
LizardTech - Genuine Fractals
Qimage 2003 for Windows 95/98/Me/NT/2000/XP

For data recovery:
Handy Recovery
Memory Card Recovery Tools
Data recovery software, mailbox management software by Ontrack Data Recovery
PC INSPECTOR - File Recovery
PHOTORECOVERY� for Digital Media
PhotoRescue

Tools:
10DRemote
DOFMaster - Depth Of Field Calculators
DSLR Remote Pro - Canon Remote Capture Software for Canon EOS-1D, EOS-1DS, EOS 10D, 300D, DIGITAL REBEL via a PC Using FireWire
FECSet for 300D
Glass Lantern Home - PocketLoupe and Pixfer for Pocket PC
Profile Mechanic - Color Profiling for scanners, cameras and monitors

Tests:
Noise Reduction Tool Comparison

Canon:
BeBit Top Page - English
Canon EOS 5D DIGITAL
EOS 5D Firmware Update

Reviews:
FM Reviews - Canon lenses main
Rob Galbraith DPI Canon EOS 5D
dpreview.com