321Soft Video Converter for Mac - 321Soft Mac Video Converter allows you to easily download, convert and edit video, HD video, 4K video, audio on Mac OS X.
digiKam - Professional Photo Management with the Power of Open Source
HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
FFQueue - FFQueue is a FREE and comprehensive GUI for the FFMpeg command line encoder: Convert audio and video from everything to everything!
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.