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.
DAR - Disk Archive Home Page
GoodSync - GoodSync provides highly reliable file backup and synchronization for both individuals and businesses.
bzip2 - bzip2 is a file compressor that uses the Burrows–Wheeler algorithm.
FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.
7-Zip ZS - A fork of 7-Zip with support for Brotli, Fast-LZMA2, Lizard, LZ4, LZ5 and Zstandard