Image Tuner is described as 'free software for batch resizing, converting, watermarking and renaming your digital photos and images from more than 20 image formats to JPEG, BMP, PNG, TIFF and GIF formats' and is an app in the Photos & Graphics category. There are more than 50 alternatives to Image Tuner for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Android. The best alternative is ImageMagick, which is both free and Open Source. Other great apps like Image Tuner are RIOT - Radical Image Optimization Tool (Free), XnConvert (Free Personal), FastStone Photo Resizer (Free Personal) and PNGGauntlet (Free).
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.
Photo Batch will help you process all your images at once. No more repetitive work, simply drag the images or the folders you wish to process into Photo Batch, then apply the desired effects, crop, rotate, resize and rename them all and finally export them.
PhotoResize is a simple tool for very fast batch resizing of photos and pictures in JPEG format. Beyond simple options however, Picture Resizer also contains support for seam-carving (changing size while preserving content), image sharpening, metadata, and other options.
Find, resize, crop, watermark, enhance, adjust, convert, rename, and process your pictures and photos in 30+ image formats with 120+ filters and effects using this graphics software. It features 4 processing modes, per-channel filters, layers, more!.
Total Image Converter converts images to other formats, crops, resizes and rotates them. Convert large TIFFs into small JPEGs, make photos suitable for the web or recover old photos in unsupported formats - Total Image Converter will do everything for you.
Resize, add watermarks and share your pictures with a single click. CoolTweak is a nice tool that expands the use of right-click menus on the OS level with actions you are able to tweak to fit your needs.