1)   Easy MP3 Joiner 2.9
Easy MP3 Joiner is just the piece of software you have been looking for! Just drag'n'drop your favorite music from Windows Explorer into the program window or add them through the program dialog, arrange them and press the "Join" button.

 2)   HiFi WMA Splitter Joiner 4.3.1612
HiFi WMA Splitter Joiner builds wma cutter and wma joiner in one software. supporting batch wma files splitter and joiner into one. It can extract the best parts of various audio files. It can also join the best parts of many wma files together.

 3)   HiFi WMA Splitter Joiner 6 4.87
HiFi WMA Splitter Joiner builds wma cutter and wma joiner in one software. supporting batch wma files splitter and joiner into one. It can extract the best parts of various audio files. It can also join the best parts of many wma files together.

 4)   AimOne ASF/WMV/WMA Cutter & Joiner 1.01
AimOne ASF/WMV/WMA Cutter & Joiner is a powerful Windows Media(.asf, .wmv, .wma) edit tool, with it, you can split/cut ASF/WMV/WMA iinto smaller one without re-encode; also you can join mulitple ASF/WMV/WMA files into one "non-stop" file.