X-Split

From Yeahsoft:

This tool can split or rejoin all kinds of files and folder by click on the right button under explorer, also, it can bind files of different types. Such as Txt, Html, Mp3. Moreover, it can join files that split by other split-tools together. ( if the tool can uses 'COPY /b' to rejoin files). There would be a 'bat' file when split files, it can help you to rejoin the files without this tool. Also , you can drop and drag, split to floppy and right-click menu. The effect of rejoining is equal to running 'copy/b file1+file2+... outfile'. So ,it can replace 'copy' of DOS.