Leafnode

Leafnode
Original author(s)Arnt Gulbrandsen
Developer(s)Matthias Andree
Initial release1995 (1995)
Stable release
1.12.0 / May 26, 2022 (2022-05-26)
Written inC
Operating systemUnix-like
Available inEnglish
TypeUsenet server
LicenseLGPLv2, ISC
Websitewww.leafnode.org

Leafnode is a store-and-forward NNTP (or Usenet) proxy server designed for small sites with just a few active newsgroups, but very easy to set up and maintain, when compared to INN. Originally created by Arnt Gulbrandsen in 1995 while he was working at Trolltech, it is currently maintained by Matthias Andree and Ralf Wildenhues.

The term leaf node can also be used to describe a node on a binary tree (or any other sort of tree that has nodes) which has no sub-nodes.