rsizr is a simple Flash-based web application that lets you resize JPG, PNG, and GIF images on your computer ONLY. The great feature to have this photo editor in the list is a new image resizing algorithm called seam carving (a method of image retargeting) that tries to keep intact areas in your image that are richer in detail.
Just with a few basic functions such as: Resize, Crop, Rotate, Brightness & Contrast and some special imaging effects: Blur, Polaroid, Oil Paint, etc but this free online photo editor processed over five million pictures since 2008. The advantages of this editor are simple & clean layout with images, no Flash required and many formats exporting with various quality choices.