MCNTP is a proctocol and an implementation of that protocol to exchange NetNews articles between servers in a bandwidth-friendly way. The package contains the complete suite of tools and is ready to run with a news server that uses the classical spool concept (such as INN 1.x). As of 1.2, there is also support for the INN 2.x storage API.
NewsLib is a library of Perl modules for managing Network News services. It's meant to be used for code-reuse and sharing when writing news-based applications. It includes Net::NNTP::Client (simulates a news client), Net::NNTP::Proxy (a proxying news server), and News::NNTPAuth (NNTP authentication).
MyNewsGroups :) is a USENET news client with a completely Web-based interface. It is written in PHP4, and uses a database backend. Its main purpose is to mirror all messages from subcribed public newsgroups into a database, and add extra features such as saving articles per user, statistics on users, search functions, and so on. MyNewsGroups :) is aimed at people that have a Web site and want offer their users direct access to newsgroups of same subject.
Microbrew MicroSieve is designed to be a high speed spam filter for USENET news. Given the large amount of spam riding around in major USENET news systems, a spam filter has to be very fast and remain effective. It checks for duplicate and large articles, spambots, and binaries in non-binary groups. It also has path-based auto-accept and auto-reject, as well as cross-post limiting.
retawq is a multi-threaded Web browser for text terminals on computers with Unix-like operating systems. It is fast, small, nicely configurable, and comfortable; e.g. the low-level network communications are performed in a non-blocking way, and you can keep open as many "virtual windows" as you want and work simultaneously in two of them in a split-screen mode.
nn Newsreader is a curses-based USENET news reader. The motto of nn is its expanded name, "No News is good news, but nn is better". The nn newsreader is designed to let you minimize the amount of time you spend reading news (or, more realistically, to allow you to follow even more newsgroups). Nn allows you to quickly select articles of interest and skip the rest. It also supports efficient article killing and selection of articles by author and subject.