I was searching for a good free photo editor last night, and I found many that were quite highly reviewed. I am now using photoscape, which can do many things such as:
Viewer: View your folders photos, slideshow
Editor: resizing, brightness and color adjustment, white balance, backlight correction, frames, balloons, mosaic mode, adding text, drawing pictures, cropping, filters, red eye removal, blooming
Batch editor: Batch editing multiple photos
Page: Make one photo by merging multiple photos at the page frame
Combine: Make one photo by attaching multiple photos vertically or horizontally
Animated GIF: Make one animation photo with multiple photos
Print: Print portrait shot, carte de visite, passport photo
Splitter: Divide a photo into multiple parts
Screen Capture: Capture your screenshot and save it
Color Picker: Zoom in screen on images, search and pick the color
Rename: Change photo file names in batch mode
Raw Converter: Convert RAW to JPG
www.photoscape.org
I won't give a review for all the editors, but many of them do the same as photoscape, and come with their own homepage where you can read about each of them and what they provide.
This website has a top ten pick of photo editing software for windows. You can read about most of the websites I've given links to, before you download.
Free Photo Editors for Windows - Top Picks
Picnik
Picnik - edit photos the easy way, online in your browser
GIMP
GIMP - The GNU Image Manipulation Program
Infranview
ifranview.com
Paint.net
Paint.NET - Free Software for Digital Photo Editing
Ultimate Paint
JTL Ultimate Paint Image Editor Homepage
Picasa 3
Picasa 3: Free download from Google
PiZap (Fun photo effects editor)
piZap - free online photo editor - fun photo effects editor - funny graphics
Serif Photoplus
Free Image & Photo Editing Software Download – PhotoPlus SE
VCW Vicman Photo Editor
VCW VicMan's Photo Editor - download the best image editor for photos and web graphics for free
Photofiltre
www.photofiltre.en.softonic.com
Pixia
Download
Feel free to add on if you have any other free photo editors.