1)   AC3 Tools Pro 6.6.77
AC3Tools Pro is the complete professional suite for AC3 files processing that enables to decode AC3 files into two-channel MP3, WMA, WAV or Ogg Vorbis files, extract each channel from an original AC3 file into separate files and recompose WAV PCM files into AC3 being sophisticated encoder that offers superior audio performance. AC3Tools Pro supports Dolby Prologic и Dolby Prologic II profiles to maintain full-bandwidth surround sound.

 2)   Cool Free Audio to OGG Converter 5.1
Cool Free Audio to OGG Converter is an all-in-one and professional OGG audio conversion software. With Cool Audio to OGG Converter, you can convert almost all media including AVI, WMV, MPEG, MP4, ASF, VOB, 3GP, iPhone, MOV and FLV and MP3, AAC, AC3.