SABnzbd is a cross-platform binary newsreader written in Python. It simplifies the process of downloading from Usenet dramatically, thanks to its friendly Web-based user interface and advanced built-in post-processing options that automatically verify, repair, extract, and clean up posts downloaded from Usenet. It also has a fully customizable user interface, and offers a complete API for third-party applications to hook into.
LottaNZB aims to simplify and automate downloading of binary news from Usenet. You can tell it what to download using NZB files, which are created by many Usenet search engines. It integrates nicely with GNOME desktops, but is not limited to them, and uses the mature SABnzbd software as its foundation.
zfec is a fast, portable, and programmable implementation of erasure coding. It includes a C library, a Python library, and a command-line tool. Erasure coding is also known as "forward error correction", which is the generation of redundant blocks of information such that if some blocks are lost then the original data can be recovered from the remaining blocks. The RAID-5 algorithm is an erasure code, but while RAID-5 can recover from the loss of any one element, zfec can be parameterized to choose in advance the number of elements whose loss it can tolerate.
NewsBro is a web-based application providing a Usenet newsreader service. It supports multiple users, accessing multiple news groups on multiple news servers. User profiles are maintained in order to allow for individual news preferences. It is implemented as a Java program, and requires the Java Runtime Environment (JRE) or Java Development Kit (JDK) version 1.4 or later to be installed on the server system. Users only require a standard web browser.
QBinNews is a Usenet client for downloading binary files. It features multithreaded download, multipart post joining, automatic parity, automatic rar extraction, automatic file joining, colored header filtering, database update filtering, download history, timed automatic header updates, Web integration with newzleech.com and binsearch.info, NZB support, and a built-in text and image viewer.
Leafnode is a news server, suitable for small, limited-bandwidth sites with only a few users (and useful for offline news reading). Leafnode keeps track of which groups are being read and downloads only articles in those groups. Leafnode has been designed to require no maintenance and to be easy to set up.
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.