4a studio

an excellent Mac tool to help you make ringtones for various mobile phones

convert almost all video to audio and audio to audio formats on Mac OS X

It can also convert videos to MTV video for Mac users.

convert WMA, AAC, M4A, MP4, FLV, etc to MP3 for Mac users

convert video or audio to almost all audio formats on Mac OS X.

convert music files to M4R and convert M4R to other audio formats on Mac

Transfer music and video between iPod and Mac along with various functions.

Convert or rip DVD to MP4, H.264/MPEG-4 AVC and HD video format on playback.

Convert all video formats from one to another on Mac OS X

convert WMA, AAC, M4A, MP4, FLV, etc to MP3 for Mac users