VLC media player is an open source video and audio player capable of playing almost any type of media including DVDs and VCDs. In addition to being able to play most video and audio files, VLC can also post free ads without registration
File extensions that can be opened by vlc-media-player

fmo.ASX	Advanced Stream Redirector
fmo.DTS	Digital Theater Systems Audio File
fmo.GXF	General eXchange Format
fmo.M2V	MPEG-2 Video
fmo.M3U	MP3 Uniform Resource Locator
fmo.M4V	MPEG-4 Video File
fmo.MPEG1	MPEG-1 Video
fmo.MPEG2	MPEG-2 Video
fmo.MTS	AVCHD Video File
fmo.MXF	Material eXchange Format
fmo.OGM	Ogg Multimedia Container File
fmo.PLS	Playlist
fmo.BUP	DVD Information File
fmo.A52	Dolby Digital AC-3 Compressed Audio File
fmo.AAC	Advanced Audio Coding Compressed Audio File
fmo.B4S	Winamp 3+ Playlist
fmo.CUE	Cue Sheet
fmo.DIVX	DivX Movie
fmo.DV	Digital Video
fmo.FLV	Flash Video
fmo.M1V	MPEG-1 Video
fmo.M2TS	MPEG-2 Transport Stream Videos
fmo.MKV	Matroska Video Stream
fmo.MOV	Apple QuickTime Movie
fmo.MPEG4	MPEG-4 Video
fmo.OMA	OpenMG Audio File
fmo.SPX	Ogg Speex Audio File
fmo.TS	DVD Video
fmo.VLC	VLC Media Player Data
fmo.VOB	DVD Video Object
fmo.XSPF	XML Shareable Playlist Format
fmo.DAT	VCD Video
fmo.BIN	Binary DVD Video
fmo.IFO	DVD Information File
fmo.PART	Partially Downloaded File
fmo.3G2	3G Mobile Phone Video
fmo.AVI	Audio Video Interleave
fmo.MPEG	MPEG Video
fmo.MPG	MPEG Video
fmo.FLAC	Free Lossless Audio Codec Compressed Audio FIle
fmo.M4A	MPEG-4 Audio File
fmo.MP1	MPEG-1 Audio Layer I
fmo.OGG	Ogg Multimedia Container File
fmo.WAV	Waveform Audio
fmo.XM	Extended Module Audio File
fmo.3GP	3G Mobile Phone Video
fmo.SRT	DVD Subtitles File
fmo.WMV	Windows Media Video
fmo.AC3	Dolby Digital AC-3 Compressed Audio File
fmo.ASF	Advanced Systems Format Video
fmo.MOD	MOD Audio File
fmo.MP2	MPEG-1 Audio Layer II
fmo.MP3	MPEG-1 Audio Layer 3
fmo.MP4	MPEG-4 Part 14 Multimedia Container
fmo.WMA	Windows Media Audio File
fmo.MKA	Matroska Audio Stream
fmo.M4P	Protected AAC File

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