Mipony is the most complete download manager, you can download bittorrent, direct download and Youtube videos. On the Download screen you can monitor all the download processes, but you can also filter and view only one kind of downloads.
In the “Add links” screen you can paste any link and the download will start when you click on the “Download selected” button.
When you download videos from YouTube you can choose the video quality if it allows it. When the video starts downloading, the program will ask you in what quality you want to save it.