NZBGet is a command-line based binary newsgrabber that uses nzb files as described in http://docs.newzbin.com/index.php/Newzbin:NZB_Specs, they are commonly used to describe binaries posted in the Usenet that span multiple posts.

nzbget can be run as a standalone tool, in client/server mode or as a daemon, which makes it ideal to run on NAS-devices or routers. nzbget supports automatic par-check/-repair can use scripts to postprocess downloaded files, for example to stream them to an audio/video player.