rsync

rsync is a software application for Unix which synchronizes files and directories from one location to another while minimizing data transfer using delta encoding when appropriate.

Free Open Source Mac OS X Linux BSD Haiku Cygwin

Time Machine

Time Machine is the breakthrough automatic backup that’s built right into Mac OS X. It keeps an up-to-date copy of everything on your Mac — digital photos, music, movies, TV shows, and documents.

Free Mac

Rsnapshot

rsnapshot is a rsync based backup utillity, providing filesystem snapshot functionality. it can take incremental snapshots of local and remote filesystems for any number of machines.

Free Open Source Mac OS X Linux

Duplicacy

Duplicacy is a new generation local and cloud backup tool that supports cross-computer deduplication. It is free for personal use and source code is available to commercial users.

Freemium Mac OS X Windows Linux

lsyncd

Lsyncd watches a local directory trees event monitor interface (inotify or fsevents). It aggregates and combines events for a few seconds and then spawns one (or more) process(es) to synchronize the changes. By default this is rsync.

Free Open Source Mac OS X Windows Linux

Rsync Client

An SSH browser with an rsync transfer engine. It lets you point-and-click to rsync.

Free Mac OS X

Rsync Client - Pro Edition

An SSH browser with an rsync transfer engine. It lets you point-and-click to rsync.

Commercial