SyncToy is described as 'Free PowerToy designed by Microsoft, that provides an easy to use graphical user interface that can automatically synchronize local or network files and folders, but not WebDAV-, "Windows Mobile" files or folders and no triangle-sync as only Allway Sync' and is a very popular File Sync tool in the backup & sync category. There are more than 50 alternatives to SyncToy for a variety of platforms, including Windows, Mac, Linux, Android and PortableApps.com apps. The best SyncToy alternative is FreeFileSync, which is both free and Open Source. Other great apps like SyncToy are rsync, GoodSync, SyncBack and Unison File Synchronizer.
SmartBackup is an easy to use macOS utility to sync folders, volumes, or to create a bootable clone of your startup disk. It supports different configurations for multiple destinations, excludes, can archive deleted or changed files, and features built-in automation.
Create Synchronicity is a nice, lightweight backup program with a very user-friendly - yet powerful - interface, that synchronizes files and folders extremely quickly (it can even recognize paths such as "MyUSB"\MyFolder, and locate the USB drive called...
Kup is created for helping people to keep up-to-date backups of their personal files. Connecting a USB hard drive is the primary supported way to store files, but saving files to a server over a network connection is also possible for advanced users.
FolderClone lets you make an identical copy of a folder from one drive to another. It can copy files between a desktop computer and a laptop, or replicate data between a workstation and a server, or backup to a cloud storage provider.
The Sync Folders Pro synchronizes any number of folders on the fly at the same time when there are changes, or connecting external drives at a set time or manually. The app sync folders with or without filter for folder names and / or file names.?
FBackup is a free backup software for both personal and commercial use. It protects your important data by backing it up automatically to any USB/Firewire device, local or network location. The backed up data can be either compressed (using standard zip compression) or an exact...
MirrorFolder is a real-time folder mirroring and synchronization software to backup files on Windows desktop/laptop/server computers.
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.
AllSync is the professional solution for your data synchronization, imaging, backup, update, replication and archiving needs under Microsoft Windows. AllSync supports all storage media that can be accessed via a drive letter or network path.
BFileSync is a simple file app to copy or move files between SD Card and other external storage media without rooting your device.
Automates file, folder, and drive synchronization with one- or two-way sync, scheduled jobs, LAN and USB support, portable use, change detection, reporting, and optional add-ons for exclusive file handling and Windows service operation.
Karen's Replicator copies selected files from one drive/folder to another. Source and Destination folders can reside anywhere on your network.
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does the same thing, there are more options, so it takes a bit to setup, but its as close as we'll get to SyncToy for free