RichCopy is a free performance management software and utility and is a multithreaded copying tool. Rather than copying one file at a time in serial order, RichCopy can open multiple threads simultaneously, allowing many files to be copied in parallel and cutting the total time required to complete the operation several times over. You can also pause and resume file copy operations, so if you lose network connectivity at any point, you can just pick up where you left off.
Why purchase download manager when there are freeware more efficient download managers available!!! wxDownload Fast (also known as wxDFast) is an open source download manager. It is multi-platform and builds on Windows(2k,XP), Linux and Mac OS X. Besides that, it is a multi-threaded download manager. This means that it can split a file into several pieces and download the pieces simultaneously.