Jdownloader

JDownloader is a download manager, written in Java, which allows the automatic download of files and split files from one-click hosting sites such as Rapidshare and Megaupload. JDownloader supports the use of premium accounts.^[1] Certain parts of JDownloader are open source.
JDownloader is better known in Spain and other Spanish-speaking countries. The Spanish news web site lainformacion.com listed it among the "indispensable programs that every Mac user must have".^[2] As of December 2009 the program's web site is in the top 1000 sites by traffic from Spain.^[3] The German online magazine, Chip.de designated it "newcomer of the year" for 2009 after it ranked among top 50 downloads with over half a million downloads for the year.<sup>[4]

Link</sup>
http://jdownloader.org/download/index