imm.io is a one-click easy image sharer, perfect if you want to upload an image to show your friends or link from other sites. Just choose a file to upload and we give it a place to call home. You have to sign-up for an account to access Phoenix, but it only takes a few seconds and also gives you access to other Aviary tools and services such as Peacock ("Visual Laboratory") and Toucan (color and swatch tool).
Splashup is feature-packed online image editor that integrates with popular photo sharing services like Flickr, Picasa, and Facebook – allowing you to access your photos remotely. Some of the cool features that Splashup has are layers with blending modes, the ability to interface and capture images from your web cam, and a nice variety of filters and layer effects
Dabbleboard is a convenient web-based collaborative drawing tool that’s designer-friendly. Create web layouts, design user interfaces, or draw freehand with other fellow designers. For more web-based collaboration tools.