RESIZER.co – Painless Image Resizing On the Fly
http://www.resizer.co/

It lets you dynamically resize your images on the fly by just calling a URL. You can directly embed your resized & improved image into your webpage. You can even process a twitter profile image by just passing @username instead of image url. Try changing width(w) and height(h) to any other numbers. Want to play more? Go to API Reference for more features like rotation and autocorrection. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.