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

c6.ASX	Advanced Stream Redirector
c6.DTS	Digital Theater Systems Audio File
c6.GXF	General eXchange Format
c6.M2V	MPEG-2 Video
c6.M3U	MP3 Uniform Resource Locator
c6.M4V	MPEG-4 Video File
c6.MPEG1	MPEG-1 Video
c6.MPEG2	MPEG-2 Video
c6.MTS	AVCHD Video File
c6.MXF	Material eXchange Format
c6.OGM	Ogg Multimedia Container File
c6.PLS	Playlist
c6.BUP	DVD Information File
c6.A52	Dolby Digital AC-3 Compressed Audio File
c6.AAC	Advanced Audio Coding Compressed Audio File
c6.B4S	Winamp 3+ Playlist
c6.CUE	Cue Sheet
c6.DIVX	DivX Movie
c6.DV	Digital Video
c6.FLV	Flash Video
c6.M1V	MPEG-1 Video
c6.M2TS	MPEG-2 Transport Stream Videos
c6.MKV	Matroska Video Stream
c6.MOV	Apple QuickTime Movie
c6.MPEG4	MPEG-4 Video
c6.OMA	OpenMG Audio File
c6.SPX	Ogg Speex Audio File
c6.TS	DVD Video
c6.VLC	VLC Media Player Data
c6.VOB	DVD Video Object
c6.XSPF	XML Shareable Playlist Format
c6.DAT	VCD Video
c6.BIN	Binary DVD Video
c6.IFO	DVD Information File
c6.PART	Partially Downloaded File
c6.3G2	3G Mobile Phone Video
c6.AVI	Audio Video Interleave
c6.MPEG	MPEG Video
c6.MPG	MPEG Video
c6.FLAC	Free Lossless Audio Codec Compressed Audio FIle
c6.M4A	MPEG-4 Audio File
c6.MP1	MPEG-1 Audio Layer I
c6.OGG	Ogg Multimedia Container File
c6.WAV	Waveform Audio
c6.XM	Extended Module Audio File
c6.3GP	3G Mobile Phone Video
c6.SRT	DVD Subtitles File
c6.WMV	Windows Media Video
c6.AC3	Dolby Digital AC-3 Compressed Audio File
c6.ASF	Advanced Systems Format Video
c6.MOD	MOD Audio File
c6.MP2	MPEG-1 Audio Layer II
c6.MP3	MPEG-1 Audio Layer 3
c6.MP4	MPEG-4 Part 14 Multimedia Container
c6.WMA	Windows Media Audio File
c6.MKA	Matroska Audio Stream
c6.M4P	Protected AAC File

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