Audio converter and CD ripper for various formats
fre:ac is a free audio converter and CD ripper for various formats and encoders. It features MP3, MP4/M4A, WMA, Ogg Vorbis, FLAC, AAC, and Bonk format support, integrates freedb/CDDB, CDText and ID3v2 tagging and is available in several languages.
FlvToMp3 is a program which permit you to extract the sound track of a .flv file without loss of quality. The .mp3 is generated diectly from the .flv file without reencoding. It permit you to save the quality of the audio track you extract.