This utility converts Motorola S-record files (namely .S19 files) to binary files and vice-versa. It has several useful features that allow full manipulation of record addressing and output file size.
GFileSplit is a very simple GNOME app to split a file into fixed size pieces and to join the pieces back into the original file.
In the post-floppy era, this can still be useful because of size limits on mail attachments.