Internet Download Manager is best download manager available for windows. This download manager gives boost to your download speed. There are many other managers available but I am using it since more than 4 years. IT multiplies your download speed so that you can get maximum speed. Only negative point is this software is not available for free. It is chargeable software. But you can find cracked version online.
Updates for this software are very frequent. Since this software can catch download link from almost every browser, as & when browsers gets updated, IDM also needs to get update to provide support for that browser. So updates are very frequent.
Best feature of this software is that, a button of IDM will be added to every browser. So whenever you play any video on any website including You tube, IDM will catch download link for that video & same we can download in flv format.
Also another feature is queuing. You can set queue for downloads. You can prioritize downloads you need first. Further another feature is that you can instruct software to shut down software or PC itself when all download gets completed.
So you can put download at night and can go to sleep without any tension of shutting diwn of PC.
So I highly recommend Internet Download Manager to get boost in your download speed.