HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.
AVS Video Converter - AVS Video Converter is a handy software for converting to and from major video formats like 4K UHD, MP4, VOB, WMV, 2K QHD, DVD, MPEG4, DCI 4K, MOV, and more.
FFmpeg - Open source multimedia suite for conversion, playback, profiling, and streaming.
Transcoder - Transcoder is a free command-line-based video converter that allows you to convert any size of video into a range of audio and video formats.
Xilisoft Video Converter - Xilisoft Video Converter is easy, fast, reliable, and loaded with features.
Wondershare UniConverter - Wondershare UniConverter (originally Wondershare Video Converter Ultimate) can convert any video to over 1000 formats at 30X faster speed without quality loss, burn DVD, compress/edit/download/record videos, transfer files to devices.