1)   #1 MP3 Cutter Joiner 1.00
MP3 Cutter Joiner is a powerful and easy-to-use audio editor, which builds audio cutter and joiner into one. Supports MP3, WAV, WMA and OGG format. Supports batch cutting. Cutting/joining in high precision and no quality is lost!

 2)   Visual MP3 Splitter & Joiner 6.0
Visual MP3 Splitter & Joiner is a handy software utility that can split and combine audio files. Cut files fast and easy using a waveform without losses in quality. The program can merge several files into one large. Supports batch processing mode.