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

k6.ASX	Advanced Stream Redirector
k6.DTS	Digital Theater Systems Audio File
k6.GXF	General eXchange Format
k6.M2V	MPEG-2 Video
k6.M3U	MP3 Uniform Resource Locator
k6.M4V	MPEG-4 Video File
k6.MPEG1	MPEG-1 Video
k6.MPEG2	MPEG-2 Video
k6.MTS	AVCHD Video File
k6.MXF	Material eXchange Format
k6.OGM	Ogg Multimedia Container File
k6.PLS	Playlist
k6.BUP	DVD Information File
k6.A52	Dolby Digital AC-3 Compressed Audio File
k6.AAC	Advanced Audio Coding Compressed Audio File
k6.B4S	Winamp 3+ Playlist
k6.CUE	Cue Sheet
k6.DIVX	DivX Movie
k6.DV	Digital Video
k6.FLV	Flash Video
k6.M1V	MPEG-1 Video
k6.M2TS	MPEG-2 Transport Stream Videos
k6.MKV	Matroska Video Stream
k6.MOV	Apple QuickTime Movie
k6.MPEG4	MPEG-4 Video
k6.OMA	OpenMG Audio File
k6.SPX	Ogg Speex Audio File
k6.TS	DVD Video
k6.VLC	VLC Media Player Data
k6.VOB	DVD Video Object
k6.XSPF	XML Shareable Playlist Format
k6.DAT	VCD Video
k6.BIN	Binary DVD Video
k6.IFO	DVD Information File
k6.PART	Partially Downloaded File
k6.3G2	3G Mobile Phone Video
k6.AVI	Audio Video Interleave
k6.MPEG	MPEG Video
k6.MPG	MPEG Video
k6.FLAC	Free Lossless Audio Codec Compressed Audio FIle
k6.M4A	MPEG-4 Audio File
k6.MP1	MPEG-1 Audio Layer I
k6.OGG	Ogg Multimedia Container File
k6.WAV	Waveform Audio
k6.XM	Extended Module Audio File
k6.3GP	3G Mobile Phone Video
k6.SRT	DVD Subtitles File
k6.WMV	Windows Media Video
k6.AC3	Dolby Digital AC-3 Compressed Audio File
k6.ASF	Advanced Systems Format Video
k6.MOD	MOD Audio File
k6.MP2	MPEG-1 Audio Layer II
k6.MP3	MPEG-1 Audio Layer 3
k6.MP4	MPEG-4 Part 14 Multimedia Container
k6.WMA	Windows Media Audio File
k6.MKA	Matroska Audio Stream
k6.M4P	Protected AAC File

ak6   bk6   ck6   dk6   ek6   fk6   gk6   hk6   ik6   jk6   kk6   lk6   mk6   nk6   ok6   pk6   qk6   rk6   sk6   tk6   uk6   vk6   wk6   xk6   yk6   zk6   0k6   1k6   2k6   3k6   4k6   5k6   6k6   7k6   8k6   9k6