Features
mp3 converter
mp4 converter
audio decoder (convert to wav)
mp3 compressor (mp3 resizer)
mp4 compressor (mp4 resizer)
Metadata read/write
yacib FLV MP4 Detector v1.1.0.0

Mp3 converter and mp4 converter

Converts different audio and video file types (see Supported Files) to mp3 or mp4 by "Portable" or "Advanced" mode.

Portable mode contains presets for saving more space, while advanced mode contains settings for advanced users.
Audio decoder (convert to wav)

Converts different audio and video file types to wav.
Mp3 compressor and mp4 compressor

Resizes your mp3 or mp4 files, this way you can store more music, audio books, ringtones or reduce web traffic. The freeware is designed to compress mp3 or mp4 (resize mp3 or mp4) files with little loss of quality, so you can enjoy the good quality of sound.
yacib FLV MP4 Detector

Detects FLV and MP3 / MP4 files cached by browsers from YouTube or other related websites. Converts detected files into audio (mp3) or video (mp4, avi, mpg, wmv, rm). Supported browsers: Internet Explorer, Opera, Firefox, Chrome. Recommended browsers: Internet Explorer and Opera