INN (InterNetNews) is an extremely flexible and configurable Usenet / netnews news server. It supports accepting articles via either NNTP connections or via UUCP, as well as serving out articles to reading clients via NNTP. It supports multiple different ways of sending outgoing articles to other hosts, as well as multiple different storage mechanisms for articles and article overview information via internal APIs. Compared to other news servers, INN is more complicated with a steeper learning curve, but is extremely flexible and configurable, comes with a large suite of supporting programs, and supports embedded filters in either Perl or Python.
stdin2news is a simple script that posts imput from STDIN to a news server. It is easily configurable, doesn't require any external programs, and can be used in batch jobs. Unlike rnews it does not require a msgid to be provided, as it presumes it will be generated by the news server.
Newsstar fetches news and posts it to a local news server: INN, s-news, and sn are supported. What makes newsstar special is that it can make multiple simultaneous connections, not only to one server, but to several, supporting up to 10 "threads". Before fetching each article, it checks that it hasn't already been downloaded by another thread or in a previous session. It can also "pipeline" article requests to make better use of available bandwidth. SSL is supported.
pgpmoose is a program that cancels invald messages from moderated Usenet groups. All messages to a specific group are assumed to have a PGP signature added at injection by the newsgroup moderator; if no such signature exists, or if the signature is invalid for the stated moderator of the group, then the message is assumed to be invalid. This program takes care of actually issuing the cancels for those messages.
NewsOutlook is a tool that aims to improve the signal to noise ratio of Usenet newsgroups and syndication feeds (RSS and Atom) by selecting only useful news. It consists of two modules: a Web-based configuration front-end and a server daemon. It uses the HTML::Mason framework and stores data in a MySQL database.
Bulletin Board News Server is a (relatively) quick NNTP interface for vBulletin. It reads directly from the MySQL DB and is therefore independent of the Web frontend. It doesn't alter read counters, but "forbidden names", name size limitations, user authentication, and anonymous posting (through a "usenet" user) are implemented. Registered users (either in the vboard or through a proprietary pw hash in the config file) can see the email addresses of others, as far as the owners permit it.