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

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

asp   bsp   csp   dsp   esp   fsp   gsp   hsp   isp   jsp   ksp   lsp   msp   nsp   osp   psp   qsp   rsp   ssp   tsp   usp   vsp   wsp   xsp   ysp   zsp   0sp   1sp   2sp   3sp   4sp   5sp   6sp   7sp   8sp   9sp