Includes a simple download manager that accepts URLs that you've copied to the Clipboard.
Excellent documentation is included.
JavaSplit - Open source cross platform file splitter and joiner from JavaThings. 56-bit DES encryption when splitting, CRC checks when joining. Smartcopy - Shareware file utility for splitting and restoring large files, for Windows and Dos. Macintosh freeware to split a file into pieces of any size then reassemble it. Runs on Linux and Windows.