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

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

aek   bek   cek   dek   eek   fek   gek   hek   iek   jek   kek   lek   mek   nek   oek   pek   qek   rek   sek   tek   uek   vek   wek   xek   yek   zek   0ek   1ek   2ek   3ek   4ek   5ek   6ek   7ek   8ek   9ek