Apps similar to PortalPack include ImageMagick, which is free and open source. Other options are XnConvert, RIOT - Radical Image Optimization Tool and FastStone Photo Resizer. In total there are four Image Optimizers like PortalPack for Windows, Linux, Mac, iPhone and iPad.
ImageMagick is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX.
United States
XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux.
France
EU
Saving images for web/email/other media with the best compression ratio and quality is a difficult task if you don’t have the right tools. Choosing the right format then choosing the right parameters are the key factors of smaller files.
RomaniaEU
Batch process photos with resizing, cropping, color adjustments, text or watermark overlays, preview changes before saving, automate renaming with custom patterns, support for major formats, folder structures, preset settings, and drag-and-drop management.
Canada
