HJ-Split is the best freeware for file splitting and joining.
Freeware file-splitter and joiner for Windows XP, Vista, 2000, NT, 95,
Free tool to extract audio tracks using a CUE or XMCD file.
Split MP3 files into smaller parts or join MP3 files together into a bigger one.
Split Files is a tiny application that allows the user to split a file
This is a simple application that allows you to quickly split or merge files.
It can divide a file into several smaller file fragments and join again.
A small free tool to split and join large files for an easier distribution.