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

c5.ASX	Advanced Stream Redirector
c5.DTS	Digital Theater Systems Audio File
c5.GXF	General eXchange Format
c5.M2V	MPEG-2 Video
c5.M3U	MP3 Uniform Resource Locator
c5.M4V	MPEG-4 Video File
c5.MPEG1	MPEG-1 Video
c5.MPEG2	MPEG-2 Video
c5.MTS	AVCHD Video File
c5.MXF	Material eXchange Format
c5.OGM	Ogg Multimedia Container File
c5.PLS	Playlist
c5.BUP	DVD Information File
c5.A52	Dolby Digital AC-3 Compressed Audio File
c5.AAC	Advanced Audio Coding Compressed Audio File
c5.B4S	Winamp 3+ Playlist
c5.CUE	Cue Sheet
c5.DIVX	DivX Movie
c5.DV	Digital Video
c5.FLV	Flash Video
c5.M1V	MPEG-1 Video
c5.M2TS	MPEG-2 Transport Stream Videos
c5.MKV	Matroska Video Stream
c5.MOV	Apple QuickTime Movie
c5.MPEG4	MPEG-4 Video
c5.OMA	OpenMG Audio File
c5.SPX	Ogg Speex Audio File
c5.TS	DVD Video
c5.VLC	VLC Media Player Data
c5.VOB	DVD Video Object
c5.XSPF	XML Shareable Playlist Format
c5.DAT	VCD Video
c5.BIN	Binary DVD Video
c5.IFO	DVD Information File
c5.PART	Partially Downloaded File
c5.3G2	3G Mobile Phone Video
c5.AVI	Audio Video Interleave
c5.MPEG	MPEG Video
c5.MPG	MPEG Video
c5.FLAC	Free Lossless Audio Codec Compressed Audio FIle
c5.M4A	MPEG-4 Audio File
c5.MP1	MPEG-1 Audio Layer I
c5.OGG	Ogg Multimedia Container File
c5.WAV	Waveform Audio
c5.XM	Extended Module Audio File
c5.3GP	3G Mobile Phone Video
c5.SRT	DVD Subtitles File
c5.WMV	Windows Media Video
c5.AC3	Dolby Digital AC-3 Compressed Audio File
c5.ASF	Advanced Systems Format Video
c5.MOD	MOD Audio File
c5.MP2	MPEG-1 Audio Layer II
c5.MP3	MPEG-1 Audio Layer 3
c5.MP4	MPEG-4 Part 14 Multimedia Container
c5.WMA	Windows Media Audio File
c5.MKA	Matroska Audio Stream
c5.M4P	Protected AAC File

ac5   bc5   cc5   dc5   ec5   fc5   gc5   hc5   ic5   jc5   kc5   lc5   mc5   nc5   oc5   pc5   qc5   rc5   sc5   tc5   uc5   vc5   wc5   xc5   yc5   zc5   0c5   1c5   2c5   3c5   4c5   5c5   6c5   7c5   8c5   9c5