Urd is a Web-based Usenet binary download manager. It stores the newsgroup information in a MySQL database and aggregates the articles into sets of a single download (e.g. one album or movie). The Web interface can be used to search with regular expressions. It uses its own downloading daemon that has support for scheduling downloads and updating databases. URD can also download directly from NZB files and even create NZB files. Further features include custom scripts, multiple languages, a template based Web interface, support for multiple servers, automatic par2 and unrar support, and an intuitive user interface.
NewsCache is a free cache server for USENET News. NewsCache acts to news reading clients like a news server, except that it stores only those articles that have been requested by at least one client. NewsCache targets problems of the current News System like network bandwidth consumption or the IO load caused by news clients.
The WendzelNNTPd is an IPv6-ready Usenet server that aims to be as easy to use as possible. It is portable, supports AUTHINFO authentication, contains ACLs as well as role based ACLs (RBAC), supports invisible newsgroups, and features automatic prevention of double postings. WendzelNNTPd supports MySQL as well as SQlite3 backends.
Kwooty is a .nzb usenet binary grabber for KDE 4. Its main features include multi-server support, smart Par2 download, automatic file verification/repairing and archive extraction (RAR, Zip, 7z), automatic file downloading after opening the NZB file, shutdown scheduling, built-in SSL connection support, queue management, and more.
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.