Squoosh : Squoosh is an image compression web app that allows you to dive into the advanced options provided by various image compressors.
fuelux : Extends Twitter Bootstrap with additional lightweight JavaScript controls. Easy to install, customize, update, and optimize. All functionality covered...
RoundPic : Online tool for making anti-aliased rounded corners (very Web 2.0!) for avatars and images
Caire : Caire is a content aware image resize library
Use this tool to create data streams for embedding images (or any type of file) in (X)HTML, CSS and XML.
