jRipper is an CD ripper and audio converter developed in Java, that can encode and decode Wav, Flac, MP3, Ogg, AAC(M4A) formats. A CD ripper for you to use.
The program can also do transcoding between various formats. Beware though that every transcoding deteriorate the quality of the audio file.
The license of this software is Freeware, you can free download and free use this cd ripper software.