Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
NZBGet - The most efficient usenet downloader.
Groups.io - Email and web based discussion group software, includes archiving, emails, wiki, polls, file...
SABnzbd - SABnzbd is a free/open-source cross-platform binary newsreader written in Python.
GroupSpaces - Free Group Website, Membership Database, Listserv Mailing List, Online Group Management Software : GroupSpaces
NewsBin - NewsBin Pro is a Usenet NNTP newsreader that downloads and decodes binary file attachments to...