Dariolius is a versatile program that lets you split files according to different criteria. You have full control of how you wish to split your files.
Dariolius can be set up and run unattended, and you can choose to recombine the files using either a DOS batch file or a merger program, depending on your needs. There is also a built in merger with advanced functions including the ability to merge third party split files.
Dariolius also has built in email support, so you can easily send large files to a friend from within the program.
Download: Dariolius 2.7.513