wma2oggvorbis is a Windows application which converts Windows Media Audio (.wma) files to Ogg Vorbis (.ogg) files. You provide it with a directory and it recursively processes all .wma files in and below that directory.
wma2oggvorbis is being written for Windows (Win9x/ME/2k/XP)
You may want to visit the wma2oggvorbis Project Page
wma2oggvorbis uses the Microsoft Windows Media Format SDK for reading the Windows Media Audio (.wma) files and it uses the Ogg Vorbis Win32 SDK for writing the Ogg Vorbis (.ogg) files. See the links below for more details.
Microsoft Windows Media Format SDK