XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux.

Converseen is a free cross-platform batch image processor for Windows and Linux that allows you to convert, resize, rotate and flip an infinite number of images with a mouse click.

With Filestar you can "do anything with any file". Get rid of repetitive tasks, save time and boost your productivity with over 30.000 file conversions available. Transform or convert hundreds of files, all at the same time with a few simple clicks.

Create email-friendly images, resize in batches, convert formats, and compress using high-quality filters. Integrated in Windows Explorer, it offers high-res settings, watermarking, a profiles library, PDF creation, and supports devices like iPad and iPhone.

ImBatch is a batch image processor with a nice graphical user interface. It will allow you to edit multiple image files at the click of a button by using scripts. The script will be created by combining Tasks.

With BIMP you can apply a set of manipulations to an entire group of images! It provides an easy to use interface and a lot of batch functions.

Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.

A powerful photo resizer and optimizer for Mac, allows you to optimize all your photos by 80% ~ 20% comparing to their originals while keeping their original resolution, quality.

When you use FotoFox to take a photo, FotoFox compresses the photo into a smaller version, which takes less than 10% of the space compared to the full-size one. The smaller version is perfect for browsing on the phone or sharing to Facebook or Instagram.

ImageResizer - Batch-resize and convert your images in just one click with maximum comfort.

If you want a lightweight image editor that you can use to perform basic editing tasks such as cropping, renaming, resizing and even applying watermarks to your pictures, then consider rEASYze. You can work with single or multiple images simultaneously.

The Simple Way To Resize, Rename, Crop, Rotate And Watermark 100s or 1000s of your Images with a single "Drag-and-Drop" using presets.