Switch Free Audio Converter and MP3 Converter is a freeware application from NCH which does what it says on the tin: More specifically, Switch Free Audio Converter and MP3 Converter converts audio file formats to MP3, OGG/Vorbis or WMA. A review of Switch Audio Converter has also been published.
Download Switch Audio Converter 12.01 (from Media Converters)907 KB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free