Image editing software such as Adobe Photoshop and Fireworks are indispensable tools for the professional web developer or graphic designer. However, these tools are expensive, and are overkill for certain image editing tasks. There are now a number of excellent online tools to handle basic image manipulation and editing, and these tools are not only free, but they are easy to use.
The best overall online digital image manipulation tools are listed below:
Web Resizer - http://www.webresizer.com
Dr. Pic - http://www.drpic.com/