PhotoPenguin App - PhotoPenguin is a completely free batch photo editor with support for cropping, resizing, adding watermarks, and converting photos to other formats. It works on the user's device, using the capabilities of modern browsers.

iWinSoft Image Converter - iWinSoft Image Converter is a batch image processor that allows the user to convert multiple images to most popular vector and raster image formats including EPS, PSD, PDF, TPIC, PNG, JPG and all types of RAW formats.

ImBatch - ImBatch is a batch image processor with a nice graphical user interface.

Batch PSD to JPG - Batch PSD to JPG converter

Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats

GraphicConverter - Graphic Converter for Mac and Windows, can converts image formats BMP, JPG, GIF, ICO, PNG, TIF...