TL:DR; Free Explorer-like program to view/convert/organize between 4276 different formats: audios, photos, videos.
Download Konvertor Freeware - Rating: 4.06
Image Watermark is a professional yet easy-to-use tool to apply logo or text to images. Besides, it can also convert files between 30 formats, resize, crop or rotate them at one time. Live preview gives you the chance to immediately see the result
Powerhouse all-in-one media converter (two-way among CD, MP3, WAV, WMA, OGG, MPEG-1, MPEG-2, AVI, WMV, FLIC, etc.), audio/data CD/DVD burner, VCD burner, complete audio/video editor and recorder, video creation/extraction/processing, and much more.
Well-liked batch picture editor and JPEG converter offers popular photo editing features, including resizing, cropping, rotating, mirroring, changing brightness, contrast, border, etc.