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 picasa

1a.MOV	Apple QuickTime Movie
1a.DNG	Raw Image File
1a.SR2	Sony Raw Image File
1a.DCR	Raw Image File
1a.MRW	Minolta Raw Image File
1a.SRF	Sony Raw Image File
1a.RAW	Raw Image File
1a.RAF	Raw Image File
1a.3FR	Hasselblad 3F RAW Image
1a.KDC	Raw Image File
1a.X3F	Raw Image File
1a.PEF	Raw Image File
1a.ORF	Raw Image File
1a.NEF	Raw Image File
1a.3G2	3G Mobile Phone Video
1a.CRW	Raw Image File
1a.PSD	Adobe Photoshop Image
1a.MPEG	MPEG Video
1a.TIF	Tagged Image File Format Image
1a.TIFF	Tagged Image File Format Image
1a.BMP	Windows Bitmap Image
1a.ASF	Advanced Systems Format Video
1a.WMA	Windows Media Audio File
1a.MP3	MPEG-1 Audio Layer 3
1a.CR2	Raw Image File
1a.TGA	Truevision Targa Image
1a.AVI	Audio Video Interleave
1a.MPG	MPEG Video
1a.WMV	Windows Media Video
1a.JPEG	Joint Photographic Experts Group Image
1a.GIF	Graphics Interchange Format Image
1a.JPG	Joint Photographic Experts Group Image
1a.3GP	3G Mobile Phone Video
1a.PNG	Portable Network Graphic Image

File extensions that can be opened by irfanview

1a.ANI	Animated Mouse Cursor Image
1a.DIB	Windows Bitmap Image
1a.CPT	CorelDraw Photopaint Image
1a.DCX	Multipage PCX Image
1a.SVG	Scalable Vector Graphics Image
1a.EMF	Enhanced Metafile Format Image
1a.EXE	Windows Executable File
1a.DLL	Dynamic Link Library
1a.PBM	Portable Bitmap Image
1a.PCD	Kodak Photo CD Image
1a.PGM	Portable Graymap Image
1a.TGA	Truevision Targa Image
1a.PPM	Portable Pixelmap Image
1a.MPG	MPEG Video
1a.MPEG	MPEG Video
1a.WMV	Windows Media Video
1a.GIF	Graphics Interchange Format Image
1a.DXF	AutoCAD Drawing eXchange Format Drawing
1a.JPEG	Joint Photographic Experts Group Image
1a.JPG	Joint Photographic Experts Group Image
1a.TIF	Tagged Image File Format Image
1a.MID	MIDI Audio Sequence
1a.AU	Sun / NeXT Audio File
1a.SND	Sun / NeXT Audio File
1a.WAV	Waveform Audio
1a.ASF	Advanced Systems Format Video
1a.WMA	Windows Media Audio File
1a.CUR	Mouse Cursor Image
1a.CLP	Windows Clipboard Image
1a.CRW	Raw Image File
1a.CR2	Raw Image File
1a.PDF	Portable Document Format Document
1a.DDS	Microsoft DirectDraw Surface
1a.ICL	Icon Library
1a.ICO	Windows Icon File
1a.PCX	Zsoft Paintbrush Image
1a.PSD	Adobe Photoshop Image
1a.WMF	Windows Metafile
1a.AVI	Audio Video Interleave
1a.BMP	Windows Bitmap Image
1a.TIFF	Tagged Image File Format Image
1a.AIF	Audio Interchange Format File
1a.PNG	Portable Network Graphic Image

File extensions that can be opened by songbird

1a.FLAC	Free Lossless Audio Codec Compressed Audio FIle
1a.WAV	Waveform Audio
1a.3GP	3G Mobile Phone Video
1a.M4A	MPEG-4 Audio File
1a.APE	Monkey's Audio Compressed Audio File
1a.ASF	Advanced Systems Format Video
1a.AIF	Audio Interchange Format File
1a.MID	MIDI Audio Sequence
1a.OGG	Ogg Multimedia Container File
1a.MP4	MPEG-4 Part 14 Multimedia Container
1a.AC3	Dolby Digital AC-3 Compressed Audio File
1a.WV	WavPack Compressed Audio File
1a.MP1	MPEG-1 Audio Layer I
1a.MKA	Matroska Audio Stream
1a.MOD	MOD Audio File
1a.SND	Sun / NeXT Audio File
1a.AU	Sun / NeXT Audio File
1a.MP3	MPEG-1 Audio Layer 3
1a.M4P	Protected AAC File
1a.MP2	MPEG-1 Audio Layer II
1a.WMA	Windows Media Audio File
1a.XM	Extended Module Audio File

File extensions that can be opened by vlc-media-player

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

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