RoundPic : Online tool for making anti-aliased rounded corners (very Web 2.0!) for avatars and images
Squoosh : Squoosh is an image compression web app that allows you to dive into the advanced options provided by various image compressors.
DOM Monster Bookmarklet : DOM Monster is a cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on, and give you its bill of ...
Use this tool to create data streams for embedding images (or any type of file) in (X)HTML, CSS and XML.
