HTML5 Photo Editors

http://pixlr.com

Mercury Editor:
http://jejacks0n.github.com/mercury/

http://pixlr.com

http://plone.org/products/products-imageeditor

FREE BUT VERY SIMPLE:
http://www.ajax-image-editor.com
http://sourceforge.net/projects/akoie/files/

http://aloha-editor.org

TRANSITIONS:
http://www.flash-filter.net/cube-transition-effect-online-demo.phtml 
http://www.flasheff.com/patternsshowcase/
http://www.flashcomponents.net/component/flash_masking_effects_collection.html
http://visualslideshow.com/index.html#new

EDIT IMAGE

http://www.flash-image-editor.com/flash-image-editor/index.html
http://www.flashimageeditor.com/
http://pixlr.com/editor/