There are several download managers for Linux but it is more confusing, which I have to choose and which is the best? are you confusing then you are at the right place. Here I am going to list 4 best Linux download managers. which are free and open source. You can choose one of them as per your choice. So, lets get started.. 1. XDM – Xtreme Download Manager XDM is most powerful downloader it is opensource and completely free for linmux.