Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
SABnzbd - SABnzbd is a free/open-source cross-platform binary newsreader written in Python.
TidyHQ - Organization management tool to support membership, subscriptions, event planning, and outreach.
NZBGet - The most efficient usenet downloader.
Nabble - Nabble is a forum software that are embeddable and fully customizable with scripting language.
GrabIt - GrabIt is a free application that enables you to easily find and download content from Usenet news...