MP3 Cutter Joiner 

MP3 Cutter Joiner is an easy-using digital audio editor supporting batch MP3, WAV, WMA and OGG audio files cutter and joiner into one. Users can set the start/stop time for cutting or joining conveniently by pre-listening. No quality is lost!
mp3 cutter joiner mp3 cutter mp3 splitter mp3 joiner mp3 combine wma cutter wav cutter joiner.

MediaJoin 

Easily join / combine all popular audio and video formats into a single merged file. Formats supported include MP3, WMA, WAV, OGG, AVI, MPEG-1, MPEG-2, and WMV. Optionally include audio tag information for the combined output audio file.
joiner combiner audio joiner video joiner mp3 joiner wav joiner avi joiner mpg joiner mpeg joiner wmv joiner combine audio combine video combine mp3