Converseen is an open source image converter and resizer written in C++ with the powerful Qt4 libraries. Thanks to the Magick++ image libraries it supports more than 100 image formats like DPX, EXR, GIF, JPEG, JPEG-2000, PhotoCD, PNG, Postscript, SVG, and TIFF and many others. Converseen allows you to convert, resize, rotate and flip automatically an unlimited number of images.

Screenshot of Converseen