MP3Splt version 2.1, (http://hobbes.nmsu.edu/cgi-bin/h-search?key=mp3splt)
MP3Wrap version 0.5 (http://hobbes.nmsu.edu/cgi-bin/h-search?key=mp3wrap)
and MP3Gain version 1.46.(http://hobbes.nmsu.edu/cgi-bin/h-search?key=mp3gain)
These can be used to split MP3 files, combine them, and adjust their volume, respectively.
Source: OS/2 Warp News and Rumors