RoundPic : Online tool for making anti-aliased rounded corners (very Web 2.0!) for avatars and images
Trimage (lossless) image compressor : Trimage is a cross-platform GUI and command-line interface to optimize image files via optipng, pngcrush, advpng and jpegoptim
rsizr : rsizr is a Flash application that lets you resize JPG, PNG, and GIF images on your computer. With rsizr, in addition to normal image rescaling and cro...
Your friendly neighborhood script for mangling images or video using audio editing tools.