Nice Downloads! makes downloading on Chrome pretty nice. It automatically shows and hides Chrome's download shelf when starting a new download, and notifies you when one completes. It also features a toolbar button that will popup the downloads screen, and the icon changes colour when you have active downloads. If a download is interrupted by Chrome, the shelf will remain open until you interact with it. This extension does not contain a persistent background process, and has minimal permissions! That's nice, isn't it?