GoodSync - GoodSync provides highly reliable file backup and synchronization for both individuals and businesses.
Unimus - Unimus is a Network Automation and Configuration management (NCM) solution designed for fast deployment network-wide and ease of use. Unimus does not require learning any abstraction or templating languages, and does not require any coding skills.
FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.
Oxidized - configuration backup software (IOS, JunOS) - silly attempt at rancid
rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.
RANCID - RANCID - Really Awesome New Cisco confIg Differ.