GoodSync - GoodSync provides highly reliable file backup and synchronization for both individuals and businesses.
NZBGet.com - Fast, reliable, and feature-packed NZB downloader.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
NZBGet - The most efficient usenet downloader.
arRsync - arRsync is a tool that is designed for macOS that is used for transferring and synchronizing files between a computer and a storage drive.
SABnzbd - SABnzbd is a free/open-source cross-platform binary newsreader written in Python.