Newspost is a Usenet binary autoposter for Unix.

Using newspost, it is a one command job to uuencode and post as many
binary files as you like to your favorite newsgroup.

It supports all the features you'd expect from a binary autoposter,
including authentication, posting to multiple newsgroups (cross-posting),
and all the rest. And of course you can save your settings as default
so you don't have to type in your news server every time.