SpinZip

With SpinZip you can zip your file in three ways. User-specified approximate size method will create create something like "spanned zips" that any compression app (WinZip, WinRAR, etc) can do. However, the key difference with SpinZip is that the zips created are independent of one another unlike a normal spanned set where you need all the zips to extract the files. Specified number of files per zip and automatically named zips based on filename are the other two ways.