I have some files with extension ogg(.ogg). I have tried to open them many times by using Windows Media and Real one Player but they couldn't open them.
Can someone tell me what software that I can open them ?

Thanks in advance,
Ice.

You'll need OGM decoder (Ogg DirectShow Filters):
http://www.free-codecs.com/download/Ogg_Di...how_Filters.htm

Also see the others at the bottom of that page ('RadLight Ogg Media DirectShow filter' and 'DirectShow Filters for Ogg Vorbis, Speex, Theora and FLAC').