JDownloader is a free, open-source download management tool that is aimed at heavy users of Megaupload.com and Rapidshare.com. This easy-to-use application promises to speed up the whole process of downloading files, allowing you to start, stop and pause downloads.
JDownloader has been written completely in Java and provides "link encryption", meaning it is ideal for anyone who pastes encrypted links from third party sites.
You can easily set bandwidth limitations and auto-extract archives, as well as queue an unlimited number of files to download. You will be kept up to date with their progress thanks to the status bar.
So if you are a Megaupload or Rapidshare user, JDownloader is a great solution, completing your downloads quickly and efficiently.