In addition to opening files from your computer, drawing shapes and text and opening multiple images in the tabbed interface, you can work with layers - just like you would in Photoshop. That an impressive feature to see in a web-based application. One thing it doesn’t have, however, is an undo button.

Picnik is simpler and more intuitive than most desktop apps, and thanks to being written in Flash, it’s also just as fast - normally I hate sites that are 100% Flash (mainly social networks like Capazoo and Wallop), but for web applications I think it’s fine.

Tools include greyscale effects, sepia, watermarking, flip and sharpen. You can then download your finished images or export them to Flickr or ImageShack. Picture2Life also offers a browser extension for Firefox or Internet Explorer that adds photo editing to the right-click menu.

Along with a slew of nice editing features, PXN8 also integrates with Flickr, allowing you to edit your Flickr photos with the click of a bookmarklet, then save the edits back in Flickr…For the Flickr-addicted, PXN8 gives you the opportunity to tweak your photos anytime you’re bored and at a browser. If you’re not into Flickr, the editor still offers a lot of simple, useful editing tools that may come in handy in a pinch.

Preloadr is a neat little tool that offers free photo editing for Flickr. You just log in to Flickr and give Preloadr permission to access your account - you can then choose an image to crop, rotate or flip. You can also adjust the zoom level, scale your image and add text. The drop-down menus provide yet more options: blur, sharpen, contrast, color correction, graduation curve, auto-contrast, grayscale, inverse, swirl and granulation. If you’re a Flickr Pro user, you can then save your modified image and replace the old one - if you’ve got a free account, Preloadr will upload the edited file as a new image.