Was googling around the other day and came across this "new" tool.

Switch Sound File Conversion Software

According to the website:

Switch Sound File Conversion Software
Audio File Converter.
Switch sound file conversion software is an audio file format converter for Windows or Mac. It can convert audio files from many different file formats into mp3 or wav files including wav to mp3, mp3 to wav, wma to mp3 and much more (see the supported formats list below).

Switch audio file converter is very easy to use. Just add the files you want to convert to the list, select the format you want to use, and then click the convert button.
It also has an interesting "toolbox" which allows download / integration of additional freebies for such tasks as tone generation, editing, guitar tuning, CD ripping / burning etc.

It is probably well worth a look by someone with a more critical eye than myself before adding it to the tools section.