Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Corel AfterShot Pro - Say hello to Corel AfterShot Pro 3, the world’s fastest photo workflow tool! Edit your photos up to 4x faster than Lightroom so you can spend more time behind the camera. Download a free 30-day trial today!
Darktable - darktable is an open source photography workflow application and raw developer.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.