Note: SuperCopier no longer exists and has been superseded by Ultracopier. Both are developed by alpha_once_x8.
Ultracopier is a free, open source software that allows you to optimise transfers when copying and moving files. This software is ideal for managing the transfer of very large files.
Ultracopier gives you the option to pause and resume copying later and will notify you when the transfer task is complete. You can also limit the transfer speed of a project, or even overwrite files in use.