HJSplit
is a popular set of freeware file-splitting programs created by Freebyte.com in collaboration with various programmers. HJSplit supports many platforms (Windows XP, Vista, NT, 2000, 3.x, 95/98/ME, DOS, Amiga, Java, etc.). All versions are compatible with each other and allow you to exchange files between these different platforms. E.g. a file split on the Amiga can be joined on Windows 2000 and vice versa.