Apps similar to BImageStudio include ImageMagick, which is free and open source. Other options are FastStone Photo Resizer, GraphicsMagick, Graphic Converter and Free Image Convert and Resize. In total there are six Image Converters like BImageStudio for Windows, Mac, Linux, 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
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
GraphicsMagick is the swiss army knife of image processing. Comprised of 282K physical lines (according to David A. Wheelers SLOCCount) of source code in the base package (or 952K including 3rd party libraries) it provides a robust and efficient collection of tools and libraries...
Graphic Converter for Mac and Windows, can converts image formats BMP, JPG, GIF, ICO, PNG, TIF, TIFF, JPEG, WMF, EMF, PSP, PSD, PCM, SVG, RAW and more.
Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
United Kingdom
Photo Resizer Expert - Versatile batch image resizer - Adjust, apply effects and filters to images - Watch folders - Resize image with right click in Windows Explorer.
Greece
EU
Germany
