| Dynamic Drive | Free online image optimizer. Reduce the size of your (animated) GIF, JPG, and PNG images. You can also convert from one image type to another. |
| Image Optimizer | Free online service to resize, compress and optimize your image files. There is also a downloadable version (free registration required). |
| SiteReportCard | Free online utility to compress GIF, JPEG and PNG images. |
| Xat Image Optimizer | Software for Windows to compress GIF, JPEG and PNG images. The standard version is free. The professional version offers additional features. |
