Camera Hacker - Tips, tools, hacks and reviews make this site a great resource.

DIY Photography - He started this site, as an amateur photographer, who needs studio equipment, but can't always afford to buy the expensive, branded top quality studio stuff that you can find on photo equipment stores.

Enblend Software - Enblend is a tool for compositing images. Given a set of images that overlap in some irregular way, Enblend overlays them in such a way that the seam between the images is invisible, or at least very difficult to see. Enblend does not line up the images for you. Use a tool like Hugin to do that.

Exposure Software - Exposure brings the look and feel of film to digital photography. Simulate the warmth and softness of real world film, both color and black and white. Reproduce realistic film grain, and simplify your digital photography workflow.

F-Spot - F-Spot is a full-featured personal photo management application for the GNOME desktop (http://www.gnome.org/).

GIMP - The greatest free photoshoplike software imaginable. Open Source photoshop.

hugin - With hugin you can assemble a mosaic of photographs into a complete immersive panorama, stitch any series of overlapping pictures and much more.

Phixr - Phixr is an online photo editor with some advanced color correction, despeckling and even allows you to merge photos together.

Picture Cloud - From products to people, picture clouds is a marketing tool that bring photos to life by helping you show anything online from any direction. They are quick, effortless, and free to make by dragging and dropping digital pictures taken around an item into your web browser.

Plogger - Plogger is a simple yet powerful tool -- everything you need to share your images with the world. Plogger is your photos integrated into your website, a fully featured photo sharing package with an attractive and easy to use administrative interface that makes managing your galleries a breeze.

Polaroidonizer - Give your photos that polaroid look.

Rasterbator - The Rasterbator is a web service which creates huge, rasterized images from any picture. The rasterized images can be printed and assembled into extremely cool looking posters up to 20 meters in size.

Ronald Parr's FAQ - Ronald Parr's Digital Photography FAQ is probably the most extensive and informative photography FAQ I've ever seen.

Snipshot.com - Basic nondestructive editing tools like crop, rotate and resize all online with a Javascript interface. More tools coming soon.

Tabblo - Your photos. Your words. Put them together with Tabblo and tell your story.